"Paul, in speaking to believers, thus challenges the Colossians: 'Mortify therefore your members which are upon the earth' (Col. 3:5, AV) Do you mortify? Do you make it your daily work? You must always be at it while you live; do not take a day off from this work; always be killing sin or it will be killing you."
I'm reading this through a second time, it is a very good guide to fighting sin. I've also skimmed the original version online, and this "abridged and made easy to read" version is much easier to understand. Owen is excellent as always.
"To read John Owen is to enter a rare world. Whenever I return to one of his works I find myself asking “Why do I spend time reading lesser literature?”
—Sinclair B. Ferguson
John Owen’s treatises on Indwelling Sin in Believers and The Mortification of Sin are, in my opinion, the most helpful writings on personal holiness ever written.
—Jerry Bridges
I owe more to John Owen than to any other theologian, ancient or modern; and I owe more to [The Mortification of Sin] than to anything else he wrote."
—J.I. Packer