Sin is a fruit that comes only from that root. This men sometimes take no notice of, to their great disadvantage. When they are overtaken with a sin they set themselves to repent of that sin, but do not consider the temptation that was the cause of it, to set themselves against that also to take care that they enter no more into it. Hence are they quickly again entangled by it, though they have the greatest detestation of the sin itself that can be expressed. This is a folly that possesses many who have yet a quick and living sense of sin.
Temptations have several degrees.
Some arise to such an height, do so press on the soul, so cruciate and disquiet it, so fight against all opposition that is made to it, that it is a peculiar power of temptation that he is to wrestle withal. When a fever rages, a man knows he is sick, unless his distemper have made him mad. If they grow violent, if they hurry the soul up and down, give it no rest, the soul may know that they have got the help of temptation to their assistance. The like may be said of Abraham, Jonah, Peter, and the rest. So that when any lust or corruption whatever tumultuates and disquieteth the soul, puts it with violence on sin, let the soul know that it hath got the advantage of some outward temptation, though as yet it perceiveth not wherein, or at least is become itself a peculiar temptation by some incitation or provocation that hath befallen it, and is to be looked to more than ordinarily.