Do not enjoy yourself. Enjoy dances and theaters and joy-rides and champagne and oysters; enjoy jazz and cocktails and night-clubs if you can enjoy nothing better; enjoy bigamy and burglary and any crime in the calendar, in preference to the other alternative; but never learn to enjoy yourself.
To mix science up with philosophy is only to produce a philosophy that has lost all its ideal value and a science that has lost all its practical value. It is for my private physician to tell me whether this or that food will kill me. It is for my private philosopher to tell me whether I ought to be killed.
I believe what really happens in history is this: the old man is always wrong; and the young people are always wrong about what is wrong with him. The practical form it takes is this: that, while the old man may stand by some stupid custom, the young man always attacks it with some theory that turns out to be equally stupid.