no longer I who live, but Christ lives in me.”
Just as salvation is ours through faith by grace, and not of ourselves, so it is with living the Christian life. The difference between a defeated Christian and a victorious Christian is simply this: the former lives by his own power and asks for God’s help and will almost as an afterthought, while the latter despairs of himself, lays down his life, and trusts Christ to live in his place, at all times.
The Cross is how God accomplishes this task of bringing us to the end of ourselves. Then we can say, “Not I, but Christ.”