Theory

Quotes



He who loves practice without theory is like the sailor who boards ship without a rudder and compass and never knows where he may cast
No theory is good unless it permits, not rest, but the greatest work. No theory is good except on condition that one use it to go on beyond
It is the theory that decides what can be observed
A theory can be proved by experiment; but no path leads from experiment to the birth of a theory
All theory, dear friend, is gray, but the golden tree of life springs ever green
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On Anger: "For every minute you remain angry, you give up sixty seconds of peace of mind."
Essays
On Destiny: "Our destiny exercises its influence over us even when, as yet, we have not learned its nature: it is our future that lays down the law of our today."
Human, All Too Human
On Friendship: "A crowd is not company; and faces are but a gallery of pictures; and talk but a tinkling cymbal, where there is no love."
Essays