Sanctification

...we cannot hope to reach this maturity in any other way than by yielding ourselves up utterly and willingly to His mighty working. But the sanctification the Scriptures urge as a present experience upon all believers does not consist in maturity of growth, but in purity of heart, and this may be as complete in the babe in Christ as in the veteran believer.—Hannah Whitall Smith in The Christian's Secret of a Happy Life