We must cut our coat according to our cloth, and adapt ourselves to changing circumstances.

The average man is rich enough when he has a little more than he has got.

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

No healthy civilization can ever be reared on a foundation of devitalized work.

Boredom is a certain sign that we are allowing our faculties to rust in idleness.

Nobody is bored when he is trying to make something that is beautiful or to discover something that is true.

The happiest people seem to be those who have no particular cause for being happy except that they are so.