If the universe is running down like a clock, the clock must have been wound up at a date which we could name if we knew it. The world, if it is to have an end in time, must have had a beginning in time.

The greatest obstacle to progress is not man's inherited pugnacity, but his incorrigible tendency to parasitism.

Don't get up from the feast of life without paying for your share of it.

Whoever marries the spirit of this age will find himself a widower in the next.

There are no rewards or punishments - only consequences.

Love remembered and consecrated by grief belongs, more clearly than the happy intercourse of friends, to the eternal world; it has proved itself stronger than death.

Public opinion, a vulgar, impertinent, anonymous tyrant who deliberately makes life unpleasant for anyone who is not content to the average person.