Jacobi in Two Ideas
the essentialsReason leads to fatalism
Consistent rational demonstration ends in Spinoza’s determinism and atheism; only a leap (salto mortale) of faith escapes it.
Nihilism
In his 1799 letter to Fichte he charged that Idealism, by making the I the source of everything, reduces reality to nothing — and called this Nihilismus.
In 1785 Jacobi revealed that the revered Lessing had confessed himself a Spinozist, igniting the Pantheism Controversy that dominated German thought for a generation. His reproach to Fichte — that philosophy of the pure I is “nihilism” — is the first important philosophical use of the word.
Curiosities
did you know?- He was the first major philosopher to use the word ‘nihilism’.
Questions to Argue About
debate club →- Does consistent reasoning lead to atheism?
Explore Next
related by shared connections
Critique of Pure Reason
Kant’s masterwork, asking what reason can know without experience — and answering that it can know the forms of all possible experience, but nothing beyond.
Does God Exist?
The proofs, the refutations, the wagers and the leaps — the great argument about God from the Upanishads to Nietzsche.
Faith vs. Reason
Can God be reached by argument — or does faith begin exactly where reason fails? From Tertullian’s Athens and Jerusalem to Kierkegaard’s leap and Camus’s refusal.
Continental Rationalism
The seventeenth-century conviction that reason alone, unaided by the senses, can reach certain knowledge of the deepest truths.
Rationalism vs. Empiricism
The great quarrel of early modern philosophy — does knowledge come from reason or from experience? Kant tried to end it.
Georg Wilhelm Friedrich Hegel
The philosopher of Spirit and dialectic, for whom reality is a rational process working itself out through contradiction in history — “the real is the rational”.