Love each other or perish.

Composing mortals with immortal fire.

'Healing,' Papa would tell me, 'is not a science, but the intuitive art of wooing nature.'

Almost all of our relationships begin and most of them continue as forms of mutual exploitation, a mental or physical barter, to be terminated when one or both parties run out of goods.

How happy is the lot of the mathematician! He is judged solely by his peers, and the standard is so high that no colleague or rival can ever win a reputation he does not deserve. No cashier writes a letter to the press complaining about the incomprehensibility of Modern Mathematics and comparing it unfavorably with the good old days when mathematicians were content to paper irregularly shaped rooms and fill bathtubs without closing the waste pipe.

Between labor and play stands work. A man is a worker if he is personally interested in the job which society pays him to do; whatfrom the point of view of society is necessary labor is from his point of view voluntary play. Whether a job is to be classified as labor or work depends, not on the job itself, but on the tastes of the individual who undertakes it. The difference does not, for example, coincide with the difference between a manual and a mental job; a gardener or a cobbler may be a worker, a bank clerk a laborer.

Had Greek civilization never existed ... we would never have become fully conscious.