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.

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.

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.

Green was the silence, wet was the light, the month of June trembled like a butterfly.

Maybe Christmas is more than a day to receive. Maybe Christmas, perhaps, is a day to believe.

I'm a traditionalist, so for me, black coffee is cool.

I like flesh. I do! Something to hold.

What we makes of the world must be largely dependent on the sense-organs that we happen to possess. How the world must have changed since the man came to rely on his eyes rather than his nose.

Is not this lily pure? What fuller can procure A white so perfect, spotless clear As in this flower doth appear?

The transcendent importance of love and good-will in all human relationships is shown by their mighty beneficent effect upon the individual and upon society.

I would speak up if I see someone being rude to someone.

Don't be a blueprint. Be an original.

Please know that being 80 is not a scary thing. When you're 80, your life is much freer.