The one self- knowledge worth having is to know one's own mind.
Up to a certain point every man is what he thinks he is.
But when one has ceased to have them, too often one cannot.
The force of the blow depends on the resistance. It is sometimes better not to struggle against temptation. Either fly or yield at once.
The deadliest foe to virtue would be complete self-knowledge.
My external sensations are no less private to my self than are my thoughts or my feelings. In either case my experience falls within my own circle, a circle closed on the outside... the whole world for each is peculiar and private to that soul.