What would get D.A. Carson, Research Professor of New Testament at Trinity Evangelical Divinity School, to say "That is invaluable…It understands Christian sanctification in one pithy statement better than anything I know"?
John Newton’s reflection on himself in light of Jesus, that’s what:
I am not what I ought to be.
Ah! how imperfect and deficient.
Not what I might be,
considering my privileges and opportunities.
Not what I wish to be,
God, who knows my heart, knows I wish to be like him.
I am not what I hope to be;
ere long to drop this clay tabernacle, to be like him and see him as he is.
Not what I once was,
a child of sin, and slave of the devil.
Though not all these,
not what I ought to be,
not what I might be,
not what I wish or hope to be, and
not what I once was,
I think I can truly say with the apostle,
By the grace of God, I am what I am.
Read. Meditate. Say it out loud. Repeat.
(Both quotes above are from Newton on the Christian Life, by Tony Reinke)