Everybody should do at least two things each day that he hates to do, just for practice.
All our life, so far as it has definite form, is but a mass of habits.
In the practical use of our intellect, forgetting is as important as remembering.
Every man who possibly can should force himself to a holiday of a full month in a year, whether he feels like taking it or not.
Our ideas must agree with realities, be such realities concrete or abstract
What holds attention determines action.