The wise use of leisure, it must be conceded, is a product of civilization and education.
As men begin to grow civilized, they cease to be satisfied with mere taboos.
Dogmatism is the greatest of mental obstacles to human happiness.
I did not, however, commit suicide, because I wished to know more of mathematics.
The time you enjoy wasting is not wasted time.
When we perceive any object of a familiar kind, much of what appears subjectively to be immediately given is really derived from past experience.