Let anyone therefore think how easily he could confute a man that pretended to great strictness of life without prayer, and the same arguments will as plainly confute another that pretends to strictness of prayer without carrying the same strictness into every other part of life. For to be weak and foolish in spending our time and fortune is no greater a mistake than to be weak and foolish in relation to our prayers. And to allow ourselves in any ways of life that neither are nor can be offered to God is the same irreligion as to neglect our prayers or use them in such a manner as makes them an offering unworthy of God.

William Law: A Serious Call to a Devout and Holy Life