I am more afraid of my own heart than the Pope and all his cardinals. I have within me the great Pope, Self.
Martin Luther
The soul's impurity consists in bad judgments, and purification consists in producing in it right judgments, and the pure soul is one which has right judgments.
Epictetus
Each has his past shut in him like the leaves of a book known to him by heart and his friends can only read the title.