Unrestrained desires always imply guilt.— The man, whose desires are unrestrained, is a man, that chooses to have his own way, lives his own life, operates upon his own stock; and, in a word, claims to be a God in his own right. It is obvious, that under a divine government there can be no virtue without subordination. The moment, therefore, that the desire, which is inherent in any creature, gets the ascendency and violates the law of obedience to the Supreme Ruler, that moment he is no longer the same being; but has undergone a change, as fatal as it is sudden, from truth to falsehood and from honor to guilt. How important is it, then, that the natural desires should be checked and subdued; and that they should be subdued to that point, where they shall be practically lost in the one preeminent and gracious desire, of knowing and doing the will of God.
— edited from The Interior or Hidden Life (1844), Part 2, Chapter 2.