A bartender is just a pharmacist with a limited inventory.

Give back to the world at least what you've received.

Falling in love is not at all the most stupid thing that people do - but gravitation cannot be held responsible for it.

Do you believe in immortality? No, and one life is enough for me.

Fear or stupidity has always been the basis of most human actions.

There is no vaccine against stupidity.

It must be conceded that a theory has an important advantage if its basic concepts and fundamental hypotheses are 'close to experience,' and greater confidence in such a theory is certainly justified. There is less danger of going completely astray, particularly since it takes so much less time and effort to disprove such theories by experience. Yet more and more, as the depth of our knowledge increases, we must give up this advantage in our quest for logical simplicity in the foundations of physical theory.