If Christian in Pilgrim's Progress simply yielded himself to God, and never fought, or struggled, or wrestled, I have read the famous allegory in vain. J.C. Ryle, Holiness, pp. We may summarize the human factor in sanctification by saying that it includes both faith and obedience. As the branch partakes of the life of the sap and nourishment of the vine, so the soul who by faith is united to Christ becomes a partaker in His life. The believer must work out what God works in.
Human activity is enlisted in the great work of building a character after the divine similitude.
This is the greatest and most important work that any human being is called to engage in.