This body of ours has one fault: the more you indulge it, the more things it discovers to be essential to it. It is extraordinary how it likes being indulged.
Teresa of AvilaLet him never cease from prayer who has once begun it, be his life ever so wicked; for prayer is the way to amend it, and without prayer such amendment will be much more difficult.
Teresa of AvilaKeep this in mind, for it is very important advice, so do not neglect it until you find you have such a fixed determination not to offend the Lord that you would rather lose a thousand lives and be persecuted by the whole world, than commit one mortal sin, and until you are most careful not to commit venial sins.
Teresa of Avila