From The Great Exchange, by Jerry Bridges and Bob Bevington: 

The cross is not a mere first step toward spiritual development; is is the all-encompassing foundation for Christian growth. ..[I]t first provides complete forgivenss of past, present, and future sins, and then it becomes a means of the deliverance by which we are freed from bondage to sin….

 
By tying the transformation of the believer to the cross, Paul makes his point aboundantly clear: everything we need for life and eternity is provided by virture of Christ’s great atonement. Furthermore, in everything God is for us; he is for us in Christ wisdom instead of ignorance, justification instead of condemnation, sanctification instead of sinfulnees, and redemption instead of slavery. “[God] is the source of [our] life in Christ Jesus, whom God made our wisdom and our righteousness and santification and redemption” (1 Cor. 1:30). In view of this, it is no wonder Paul is adamant and unwavering regarding the centrality of the cross of Christ. The fulfillment of every hope we have is blood bought by the atoning work of Christ on the Cross. And the work of Christ on the cross must remain our only hope.

Expect a review of this book to be posted here soon.