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 men’s hearts, and brings them to ruin.

Believers obey Christ as the one whom our obedience is accepted by God. Believers know all their duties are weak, imperfect, and unable to abide in God's presence. Therefore they look to Christ as the one who bears the iniquity of their holy things, who adds incense to their prayers, gathers out all the weeds from their duties and makes them acceptable to God.

I have known some good men who have been so addicted to their study, that they have thought the last day of the week sufficient to prepare for their ministry, though they employ all the rest of the week in other studies. But your business is to trade with your spiritual abilities. ... A man may preach a very good sermon, who is otherwise himself; but he will never make a good minister of Jesus Christ, whose mind and heart are not always in the work. Spiritual gifts will require continual ruminating on the things of the Gospel in our minds.

He who finds not opposition from sin, and who sets not himself in every particular to its mortification, is at peace with it, not dying to it.

...but let it suffice us to know that it became God, who is the supreme Ruler, Governor and Judge of all that sin should be punished with death in the sinner or his surety; and therefore if God would bring many sons to glory, the Captain of their salvation must undergo sufferings and death, to make satisfaction for them.

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.

We are never nearer Christ than when we find ourselves lost in a holy amazement at His unspeakable love.