One of the most prominent French scientific and intellectual minds of the seventeenth century. He was born in 1623 in Clermont-Ferrand, and died young in Paris at the age of 39.
Blaise Pascal combined the sciences of mathematics, physics, philosophy, and literature, and left a scientific and intellectual legacy whose impact extended centuries beyond his time.
He contributed to laying the foundations of modern probability theory, and formulated what was later known as Pascal’s principle of pressure. He was also famous for his religious and philosophical ideas, which believed that realizing God was achieved by the heart as much as by the mind. His influences were not limited to his time, as his ideas related to intuition and knowledge extended to later philosophers, including Jean-Jacques Rousseau and Henri Bergson, and also left their mark on the development of existential philosophy.
Birth and upbringing
Blaise Pascal was born on June 19, 1623 in the French city of Clermont-Ferrand. His mother died while he and his two sisters were still young, so his father took responsibility for their upbringing and education.
Pascal grew up in a wealthy and educated family. His father, Etienne Pascal, was a judge in the Tax Court. He was fluent in Latin and Greek, and interested in mathematics and natural philosophy. He was also known for his strictness and great pride in his children. As for his sister, Jacqueline, she showed early literary talent, before later becoming a nun at Port Royal Monastery.
The father moved his family to Paris in 1631 in an effort to provide a better education for his son, who showed exceptional genius at an early age. However, Pascal’s childhood was not without suffering, as he was plagued by recurring illnesses and pain throughout his life.
One family story tells that in his first year he was stricken with a mysterious illness that caused his stomach to swell and continuous bouts of crying and screaming, until those around him thought he was about to die.
Study and training
Etienne Pascal taught his children himself after the family moved to Paris, and Blaise’s talent for mathematics and engineering quickly emerged. At the age of twelve, he showed great interest in geometry, and was able to absorb its principles and characteristics with remarkable speed.
Although his father preferred to postpone his son’s study of mathematics, he recognized his exceptional talent and gave him a copy of the book “Elements” by the Greek scientist Euclid.
By the age of fourteen, he was participating in weekly meetings of elite French mathematicians, a group that later became the nucleus of the French Academy of Sciences.
At the age of sixteen, he began developing his own ideas and theories, and in 1640 he published a treatise entitled “An Essay on Conic Sections,” based on the work of the French mathematician Gérard Desergues, an achievement that impressed the scientific circles of the time.
Spiritual experience
In late 1639, Blaise Pascal’s family moved to Rouen after his father was appointed tax collector for the region. There, the father’s work gave his son the opportunity to learn about the computational complexities imposed by the tax administration, which would later lead him to one of his most prominent inventions.
In January 1646, Pascal’s father was involved in an accident that resulted in a broken leg and injuries to his hip, so the family hired two brothers who specialized in treating fractures to live in the house and supervise his treatment.
The two brothers were followers of the Jansenism movement associated with the monastery of Port Royal, and influenced by the ideas of Saint Augustine, which emphasized the grace of God, asceticism, austerity, and repentance.
Pascal and his family members were influenced by these ideas, and he began reading the works of Augustine and Jansenist theologians with passion, and then began calling on his family to embrace this religious vision. His sister Gilbert described this stage as the “first intellectual transformation” in his life, distinguishing it from the deeper spiritual transformation that he would witness in 1654.
In the world of inventions
Despite this religious preoccupation, his interest in the natural sciences did not diminish. During his stay in Rouen, in 1642, he began designing a mechanical calculator to help his father complete tax calculations. After years of development, he came up with the “Pascaline” machine, which is the first practical and effective mechanical calculator in history.
Pascal faced major technical challenges due to the French monetary system at the time, which made calculations more complex than modern decimal systems.
However, he succeeded in designing a machine based on 8 interconnected moving disks, capable of performing the addition and subtraction operations automatically, while the multiplication and division operations were accomplished by repeating the addition and subtraction operations.
In 1649, he obtained a royal privilege to manufacture and market the instrument, but its sales remained limited, so production stopped after about 10 years. Nine original models are still preserved today, testament to his engineering abilities as well as his athletic talent.
At that stage, he also tried to design a perpetual motion machine, and he is credited with developing the idea of a roulette wheel as one of the side results of these experiments.
Methods to Pascal’s principle
After his return to Paris in 1647, Pascal resumed his physical research, focusing on the issues of vacuum and atmospheric pressure, which were the subject of widespread controversy among scientists of that era.
In his research, he relied on the work of the Italian scientist Galileo Galilei and the scientist Evangelista Torricelli, the inventor of the mercury barometer, and he conducted a series of experiments to test the hypothesis that air pressure decreases as we rise above the surface of the Earth.
The most famous of these experiments was the one conducted on the Puy-de-Dôme mountain near Clermont-Ferrand, where atmospheric pressure readings were compared between the foot of the mountain and its summit. The results showed a decrease in pressure with increasing altitude, providing strong evidence of the existence of the atmosphere and the reality of a vacuum.
These researches contributed to paving the way for studies of fluids and hydrostatics, and also led him to formulate what was later known as “Pascal’s Principle,” which is based on the transmission of pressure in a confined fluid equally in all directions. Based on this principle, he invented the hydraulic press and the medical syringe, and established himself as one of the most prominent experimental scientists of the seventeenth century.
Besides his physics research, Pascal continued to develop his mathematical ideas. After his father’s death in 1651, he took over the management of the family property, then devoted himself more to his scientific work. He created the “arithmetic triangle” known today as Pascal’s triangle, and contributed, in cooperation with Pierre de Fermat, to laying the first foundations of probability theory.
In 1653, he published his book “A Treatise on the Equilibrium of Fluids,” which contributed to the development of fluid science.
His most prominent writings and works
The year 1654 witnessed a decisive turning point in his life after he survived a carriage accident that almost claimed his life. This was followed by a profound spiritual experience known as the “Night of Fire,” which prompted him to devote a large part of his life to philosophy and defending his religious beliefs. He joined the Port Royal Monastery, and directed his interest towards religious and intellectual writing.
At this stage, he wrote a number of his most prominent religious and intellectual works in the seventeenth century, the most famous of which is the book “Les Provinciales,” in which he criticized some of the practices of the Jesuits and defended the ideas of Jansenism. He was distinguished by his sharp literary style and his widespread influence on French thought.
He also began preparing a book entitled “A Defense of the Christian Religion” (Apologie de la religion chrétienne), through which he wanted to present a philosophical defense of Christianity based on his reflections on miracles and religious evidence. However, the project remained incomplete due to his death, and his notes and fragments that he wrote between the years 1657 and 1658 were collected and later published under the title “Pensées,” which is considered one of the most prominent works of modern Christian thought.
In this book, Pascal depicts man, in the absence of divine grace, as a being who combines greatness and misery, unable to achieve truth and the highest good despite his aspiration for them. He believes that religion is able to explain this human contradiction, while philosophy and worldly life are unable to do so.
One of the most famous ideas contained in the book is what was later known as “Pascal’s Wager,” as he argues that belief in God is the most rational option; Because the believer does not lose anything if it is proven that God does not exist, while he gains eternal life if his existence is proven.
Pascal stressed that knowledge of God can only be achieved through Jesus Christ, considering that a limited person cannot comprehend the infinite unless God takes the initiative to reveal himself to humans. He also dealt with the interpretation of the prophecies and symbols contained in the Bible according to the Augustinian approach, and reviewed the rabbinic texts, the role of the Prophet Moses, the image of the early church, and the evidence that he considered “supportive of the divinity of Christ.”
His goal in this work was not merely to persuade others to embrace Christianity, but rather to seek to build a deep spiritual life. Therefore, he viewed “Ideas” as a work on spirituality rather than an intellectual debate. In addressing intellectuals and skeptics, he relied on the ideas of a number of thinkers whom he respected.
Despite his early death in 1662, Pascal left an exceptional scientific and philosophical legacy, in which he combined a creative mathematician, an experimental scientist, and a religious thinker, to remain one of the most prominent symbols of European thought in the seventeenth century.
Death
In his last years, Blaise Pascal returned to some of his scientific interests. He participated in preparing an engineering book for the Abbey of Port-Royal group, and was encouraged to publish his research on cycloid curves, which were of wide interest among the great mathematicians of his time.
However, his health condition began to deteriorate rapidly since 1659. He suffered from fever, stomach pain, headaches, fainting spells, and convulsions, which led him to gradually reduce his scientific activity. During that period, his tendency towards asceticism and austerity increased, so he abandoned many aspects of comfort, brought a poor family into his house to live with him, and devoted a large portion of his time and money to helping those in need.
Despite his severe illness, in 1662 he contributed to the establishment of a public transportation system within Paris, which some historians consider to be the first regular public transportation system in the city. He also continued – to a limited extent – his participation in the religious controversy associated with the Jansenist movement, before moving away from those controversies while maintaining his relations with his friends in Port Royal.
On August 19, 1662, Pascal died in Paris at the age of 39. Historical sources suggested that his death resulted from cancerous meningitis associated with a malignant stomach ulcer. The autopsy conducted after his death also showed that he had stomach cancer and other diseases in the liver and brain, which explains part of the health problems that plagued him throughout his life.
