Anyone who is not totally dead to himself will soon find that he is tempted and overcome by piddling and frivolous things. Whoever is weak in spirit, given to the flesh and inclined to sensual things can, but only with great difficulty, drag himself away from his earthly desires. Therefore he is often gloomy and sad when he is trying to pull himself away from them, and easily gives way to anger should someone attempt to oppose him.
Thomas a KempisRemain tranquil and prepare to bear still greater trials. All is not lost even though you be troubled oftener or tempted more grievously. You are a man, not God. You are flesh, not an angel. How can you possibly expect to remain always in the same state of virtue when the angels in heaven and the first man in paradise failed to do so? I am He who rescues the afflicted and brings to My divinity those who know their own weakness.
Thomas a Kempis