Life is one long struggle between conclusions based on abstract ways of conceiving cases, and opposite conclusions prompted by our instinctive perception of them.

The greatest discovery of my generation is that a human being can alter his life by altering his attitudes.

The function of ignoring, of inattention, is as vital a factor in mental progress as the function of attention itself.

Science, like life, feeds on its own decay. New facts burst old rules; then newly divined conceptions bind old and new together into a reconciling law.

In the acquisition of a new habit, or the leaving off of an old one, we must take care to launch ourselves with as strong and decided an initiative as possible.

Faith is synonymous with working hypothesis.

Nothing is so fatiguing as the eternal hanging on of an uncompleted task.