A man's work is in danger of deteriorating when he thinks he has found the one best formula for doing it. If he thinks that, he is likely to feel that all he needs is merely to go on repeating himself . . . so long as a person is searching for better ways of doing his work, he is fairly safe.
Our civilization survives in the complacency of cowardly or malignant minds -- a sacrifice to the vanity of aging adolescents.
We shall have no better conditions in the future if we are satisfied with all those which we have at present.
Complacency is the enemy of study.
Don't let your special character and values, the secret that you know and no one else does, the truth -- don't let that get swallowed up by the great chewing complacency.