Choose they must. The possession of free-will, and the perception of opposing objects of choice, either exciting desire, or developing the rational affirmation of obligation to choose, render choice one way or the other inevitable. The law directs how they ought to choose. If they do not choose thus, it must be because they choose otherwise, and not because they do not choose at all. It cannot consist in the choice of moral evil, or sin, as an ultimate end.
Sin is but an element or attribute of choice or intention, or it is intention itself.
If sin is but an element or attribute of choice or intention, then to suppose the sinner to choose it as an end, were to make choice or intention terminate on an element or attribute of itself, to suppose him to choose as an end an element of his own choice. This also is absurd and a contradiction. The nature of a moral being forbids that he should choose sin for its own sake. He may choose those things the choosing of which is sinful, but it is not the sinfulness of the choice upon which the intention terminates. This is naturally impossible.