Man is obviously made for thinking. Therein lies all his dignity and his merit; and his whole duty is to think as he ought.

We have an idea of truth, invincible to all scepticism.

By space the universe encompasses and swallows me up like an atom; by thought I comprehend the world.

Thought makes the whole dignity of man; therefore endeavor to think well, that is the only morality.

When we are in love we seem to ourselves quite different from what we were before.

The finite is annihilated in the presence of the infinite, and becomes a pure nothing. So our spirit before God, so our justice before divine justice.

Contradiction is not a sign of falsity, nor the lack of contradiction a sign of truth.