Anyone who doesn’t take truth seriously in small matters cannot be trusted in large ones either.

Concern for man and his fate must always form the chief interest of all technical endeavors. Never forget this in the midst of your diagrams and equations.

Common sense is the collection of prejudices acquired by age eighteen.

A man should look for what is, and not for what he thinks should be.

Before God we are all equally wise – and equally foolish.

Any man who can drive safely while kissing a pretty girl is simply not giving the kiss the attention it deserves.

A table, a chair, a bowl of fruit and a violin; what else does a man need to be happy?

A question that sometimes drives me hazy: am I or are the others crazy?

All religions, arts and sciences are branches of the same tree.

Anyone who has never made a mistake has never tried anything new.

A person who never made a mistake never tried anything new.

As far as I’m concerned, I prefer silent vice to ostentatious virtue.

An empty stomach is not a good political adviser.

All these primary impulses, not easily described in words, are the springs of man’s actions.

Any intelligent fool can make things bigger and more complex… It takes a touch of genius – and a lot of courage to move in the opposite direction.

All that is valuable in human society depends upon the opportunity for development accorded the individual.

As far as the laws of mathematics refer to reality, they are not certain, and as far as they are certain, they do not refer to reality.

Anger dwells only in the bosom of fools.

A perfection of means, and confusion of aims, seems to be our main problem.

Any man who reads too much and uses his own brain too little falls into lazy habits of thinking.