The most stable, and therefore, the most healthy self-esteem is based on deserved respect from others rather than on external fame or celebrity and unwarranted adulation.

The major motivation theories by which most men live can lead them only to depression and cynicism.

Education is learning to grow, learning what to grow toward, learning what is good and bad, learning what is desirable and undesirable, learning what to choose and what not to choose.

Every person is, in part, 'his own project' and makes himself.

All of life is education and everybody is a teacher and everybody is forever a pupil.

The theory of science which permits and encourages the exclusion of so much that is true and real and existent cannot be considered a comprehensive science.

If you only have a hammer, you tend to see every problem as a nail.