Be killing sin or it will be killing you.

A natural man hath no such thing as free-will at all, if you take it for a power of doing that which is good and well-pleasing unto God in things spiritual.

Sin is never less quiet than when it seems to be most quiet.

Christ is our best friend, and ere long will be our only friend. I pray God with all my heart that I may be weary of everything else but converse and communion with Him.

He can make the dry parched ground of my soul to become a pool and my thirsty barren heart as springs of water. Yes he can make this habitation of dragons this heart which is so full of abominable lusts and fiery temptations to be a place of bounty and fruitfulness unto Himself

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.

Sin also carries on its war by entangling the affections and drawing them into an alliance against the mind. Grace may be enthroned in the mind, but if sin controls the affections, it has seized a fort from which it will continually assault the soul. Hence, as we shall see, mortification is chiefly directed to take place upon the affections.