Deny your desires and you will find what your heart longs for. For how do you know if any desire of yours is according to God? - John of the Cross

Yea, if a man possess all things he cannot be content, — the greater his possessions the less will be his contentment, for the heart cannot be satisfied with possessions, but rather in detachment from all things and in poverty of spirit.

If you do not learn to deny yourself, you can make no progress in perfection.

On a dark night, Kindled in love with yearnings — oh, happy chance! — I went forth without being observed, My house being now at rest. In darkness and secure, By the secret ladder, disguised — oh, happy chance! — In darkness and in concealment, My house being now at rest.