Imitation of Christ

Thomas Kempis

The spirit which is pure, sincere, and steadfast is not distracted though it hath many works to do, because it doth all things to the honour of God, and strives to be free from all thoughts of self-seeking
For true peace of heart is to be found in resisting passion, not in yielding to it.
He who puts aside the fear of God cannot long continue in good, but shall quickly fall into the snares of the devil.