Suppose I pray that you may be given grace to withstand your besetting sin (short list of candidates for this post will be forwarded on demand). Well, all the work has to be done by God and you. If I pray against my own besetting sin there will be work for me. One sometimes fights shy of admitting an act to be a sin for this very reason.

C. S. Lewis (1898-1963) English writer, literary scholar, lay theologian [Clive Staples Lewis]

Letters to Malcolm, ch. 12