We will never be able to solve the problems of tomorrow with the thinking of today

To obtain an assured favorable response from people, it is better to offer them something for their stomachs instead of their brains.

The only reason for time is so that everything doesn't happen at once.

He who finds a thought that lets us a little deeper into the eternal mystery of nature has been granted great peace.

A thought that sometimes makes me hazy: Am I - or are the others crazy?

... on principle, it is quite wrong to try founding a theory on observable magnitudes alone. In reality the very opposite happens. It is the theory which decides what we can observe.

It would seem that men always need some idiotic fiction in the name of which they can hate one another. Once it was religion. Now it is the State.