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Thinker · TH-0084

Blaise Pascal

Blaise Pascal was a French mathematician, physicist and religious thinker. He built an early calculating machine, worked on vacuum and pressure, and with Fermat…

On the Coordinates: 1.2.2 Fine-Tuning and Necessity

1623 – 1662 · Clermont (Auvergne), Paris, Rouen, Port-Royal

Traditions: Modern European

Blaise Pascal was a French mathematician, physicist and religious thinker. He built an early calculating machine, worked on vacuum and pressure, and with Fermat helped found the mathematics of probability. Associated with the Jansenists of Port-Royal, he left notes for a defence of Christianity, published after his death as the Pensées. Its wager treats belief in God as a decision under uncertainty, weighing infinite possible gain against finite cost, rather than as an argument from evidence.

Key ideas

  • When reason cannot settle whether God exists, one must still choose, and the expected gains favour wagering on God.
  • The heart has its reasons, which reason does not know.
  • Human beings are a mixture of greatness and wretchedness, a 'thinking reed'.
  • Diversion keeps people from confronting their condition.

Major works

  • Lettres provinciales (Provincial Letters, 1656–1657)
  • Traité du triangle arithmétique (Treatise on the Arithmetical Triangle)
  • Pensées (1670, posthumous)

In the conversation

In the Coordinates

The questions of philosophy where Blaise Pascal takes a place, from The Coordinates of Thought.