All sciences are vain and full of errors that are not born of Experience, the mother of all Knowledge.

The greater the man’s soul, the deeper he loves.

One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.

Beauty perishes in life, but is immortal in art.

Everything comes from everything, and everything is made out of everything, and everything returns into everything.

An arch consists of two weaknesses which, leaning one against the other, make a strength.

Every obstacle is destroyed through rigor.

Blinding ignorance does mislead us. O! Wretched mortals, open your eyes!

Marriage is like putting your hand into a bag of snakes in the hope of pulling out an eel.

The human foot is a masterpiece of engineering and a work of art.