Then when lust hath conceived, it bringeth forth sin: and sin, when it is finished, bringeth forth death. When lust hath conceived - When the evil propensity works unchecked, it bringeth forth sin - the evil act between the parties is perpetrated.
And sin, when it is finished - When this breach of the law of God and of innocence has been a sufficient time completed, it bringeth forth death - the spurious offspring is the fruit of the criminal connection, and the evidence of that death or punishment due to the transgressors.
Any person acquainted with the import of the verbs συλλαμβανειν, τικτειν, and αποκυειν, will see that this is the metaphor, and that I have not exhausted it. Συλλαμβανω signifies concipio sobolem, quae comprehenditur utero; concipio foetum; - τικτω, pario, genero, efficio; - αποκυεω ex απο et κυω, praegnans sum, in utero gero. Verbum proprium praegnantium, quae foetum maturum emittunt. Interdum etiam gignendi notionem habet. - Maius, Obser. Sacr., vol. ii., page 184. Kypke and Schleusner.
Sin is a small matter in its commencement; but by indulgence it grows great, and multiplies itself beyond all calculation. To use the rabbinical metaphor lately adduced, it is, in the commencement, like the thread of a spider's web - almost imperceptible through its extreme tenuity or fineness, and as easily broken, for it is as yet but a simple irregular imagination; afterwards it becomes like a cart rope - it has, by being indulged produced strong desire and delight; next consent; then, time, place, and opportunity serving, that which was conceived in the mind, and finished in that purpose, is consummated by act.
"The soul, which the Greek philosophers considered as the seat of the appetites and passions, is called by Philo το θηλυ, the female part of our nature; and the spirit το αρῥεν, the male part. In allusion to this notion, James represents men's lust as a harlot; which entices their understanding and will into its impure embraces, and from that conjunction conceives sin. Sin, being brought forth, immediately acts, and is nourished by frequent repetition, till at length it gains such strength that in its turn it begets death. This is the true genealogy of sin and death. Lust is the mother of sin, and sin the mother of death, and the sinner the parent of both." See Macknight.