The strongest arguments prove nothing so long as the conclusions are not verified by experience. Experimental science is the queen of sciences and the goal of all speculation.

Knowledge of languages is the doorway to wisdom.

Cease to be ruled by dogmas and authorities; look at the world!

It is easier for a man to burn down his own house than to get rid of his prejudices.

To ask the proper question is half of knowing.

Argument is conclusive, but it does not remove doubt.

A man is crazy who writes a secret in any other way than one which will conceal it from the vulgar.

Mathematics is the gate and key to science.

A little learning is a dangerous thing but none at all is fatal.

The conquest of learning is achieved through the knowledge of languages.

All science requires mathematics.

Effective love is rarely efficient.

Happiness is not a condition but a mindset.

One is left with the horrible feeling now that war settles nothing; that to win a war is as disastrous as to lose one.

Be grateful for small mercies.

Perfection is impossible. Trying to do your best is important, but loving yourself and loving others should come first.

O yellow eye, let me be sick with your heat, let me be feverish and frowning.

I think my family love each other so much and expect so much from each other, and I think we expect a type of honesty in the work that we all do.

Be truly present in the moment that you are in and don’t let life slip by unnoticed.

The greatest honor history can bestow is the title of peacemaker.

I'm not someone who gives prescriptives at the end of my films.