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Self-knowledge comes from knowing other men.

The one self-knowledge worth having is to know one's own mind.

The only knowledge which satisfies us is one which is subject to no external standards but springs from the inner life of the personality.

Knowledge of the self is the mother of all knowledge. So it is incumbent on me to know my self, to know it completely, to know its minutiae, its characteristics, its subtleties, and its very atoms.

It's not only the most difficult thing to know one's self, but the most inconvenient.

There is no self-knowledge but an historical one. No one knows what he himself is who does not know his fellow men, especially the most prominent one of the community, the master's master, the genius of the age.

I've always been a very self-aware person.

How pathetically scanty my self-knowledge is compared with, say, my knowledge of my room. There is no such thing as observation of the inner world, as there is of the outer world.

I actually think there's an incredible amount of self-knowledge that comes with getting older.

The ability to perceive or think differently is more important than the knowledge gained.