15.
For as in that it is said, "God tempteth no man," 1 it is not to be understood that God tempteth no man with any kind, but only not with some certain kind of temptation; lest that be false, which is written, "The Lord your God tempteth you;" 2 and lest we deny that Christ is God, or say that the Gospel is false, when we read that He asked His disciple "tempting him; but He Himself knew what He would do." 3 For there is a temptation which induces to sin, with which "God tempteth no man," and there is a temptation which only proves our faith, with which even God vouchsafes to tempt. So when we hear, "He that shall blaspheme against the Holy Ghost," we must not take it of every kind of blasphemy, as neither in the other place, of every kind of temptation.