God has work to do in this world; and to desert it because of its difficulties and entanglements, is to cast off His authority. It is not enough that we be just, that we be righteous, and walk with God in holiness; but we must also serve our generation, as David did before he fell asleep. God has a work to do; and not to help Him is to oppose Him.
Sin aims always at the utmost; every time it rises up to tempt or entice, if it has its own way it will go out to the utmost sin in that kind. Every unclean thought or glance would be adultery if it could, every thought of unbelief would be atheism if allowed to develop. Every rise of lust, if it has its way reaches the height of villainy; it is like the grave that is never satisfied. The deceitfulness of sin is seen in that it is modest in its first proposals but when it prevails it hardens mens' hearts, and brings them to ruin.
Let no man think to kill sin with few, easy, or gentle strokes. He who hath once smitten a serpent, if he follow not on his blow until it be slain, may repent that ever he began the quarrel. And so he who undertakes to deal with sin, and pursues it not constantly to the death.
When sin lets us alone we may let sin alone; but as sin is never less quiet than when it seems to be most quiet, and its waters are for the most part deep when they are still, so ought our contrivances against it to be vigorous at all times and in all situations.
Let our hearts admit, "I am poor and weak. Satan is too subtle, too cunning, too powerful; he watches constantly for advantages over my soul. The world presses in upon me with all sorts of pressures, pleas, and pretences. My own corruption is violent, tumultuous, enticing, and entangling. As it conceives sin, it wars within me and against me. Occasions and opportunities for temptation are innumerable. No wonder I do not know how deeply involved I have been with sin. Therefore, on God alone will I rely for my keeping. I will continually look to Him.