My child, it often happens that a man seeks ardently after something he desires and then when he has attained it he begins to think that it is not at all desirable; for affections do not remain fixed on the same thing, but rather flit from one to another.  It is no very small matter, therefore, for a man to forsake himself even in things that are very small.

A man’s true progress consists in denying himself, and the man who has denied himself is truly free and secure.

—Thomas à Kempis, The Imitation of Christ