I have suffered a great deal from writers who have quoted this or that sentence of mine either out of its context or in juxtaposition to some incongruous matter which quite distorted my meaning, or destroyed it altogether.

The factor in human life provocative of a noble discontent is the gradual emergence of a sense of criticism, founded upon appreciation of beauty, and of intellectual distinction, and of duty.

The aim of science is to seek the simplest explanation of complex facts. We are apt to fall into the error of thinking that the facts are simple because simplicity is the goal of our quest. The guiding motto in the life of every natural philosopher should be ``Seek simplicity and distrust it.''

Human life is driven forward by its dim apprehension of notions too general for its existing language.

True courage is not the brutal force of vulgar heroes, but the firm resolve of virtue and reason.

Religion will not regain its old power until it can face change in the same spirit as does science.

Everyone is a philosopher. Not everyone is good at it.