Physics is nothing but the ABC's. Nature is an equation with an unknown, a Hebrew word which is written only with consonants to which reason has to add the dots.

Nature is a book, a letter, a fairy tale (in the philosophical sense) or whatever you want to call it.

Being, belief and reason are pure relations, which cannot be dealt with absolutely, and are not things but pure scholastic concepts, signs for understanding, not for worshipping, aids to awaken our attention, not to fetter it.

What Tarquin the Proud said in his garden with the poppy blooms was understood by the son but not by the messenger.

The weakness of ourselves and of our reason makes us see flaws in beauties by making us consider everything piece by piece.

I look upon logical proofs the way a well-bred girl looks upon a love letter

The product of paper and printed ink, that we commonly call the book, is one of the great visible mediators between spirit and time, and, reflecting zeitgeist, lasts as long as ore and stone.