Michael, if one were asking you how to seek salvation, would you tell him it is a growth process? Just the same we all know that we grow once saved. If one seeks the Lord for anything, is it possible to exercise faith in any other manner than at a specific point in time? Faith incorporates an act of the will, and that happens in an instant much like the formation of a motive.
Why should asking the Lord to purify ones heart in such a manner as to walk a holy and pleasing walk before Him be any different? If one suggest that one cannot live holy before God in all the light and knowledge they have in this present world, is it not impossible for the mind to strive to achieve that which it perceives as a natural impossibility?
So many talk the talk of forsaking sin in one breath only to show us they love their sin by continuing day after day exercising their will in accordance to sin, boldly proclaiming that it is imperative that they continue in their sin and even impossible to live without it. Would not such a position be described as one of "having a form of godliness but denying the power thereof?"
Scripture never represents death as a sanctifier, it is the last enemy. Scripture never once indicates that a state of sanctification should be sought after but impossible to achieve in this present world. If we are to walk as Christ walked, and we are to be 'preserved blameless' as Scripture indicates we should be, that is going to have to happen here and now, not simply being achieved in a process that never culminates until the world to come.
1Th 5:23 And the very God of peace sanctify you wholly; and I pray God your whole spirit and soul and body be preserved blameless unto the coming of our Lord Jesus Christ.
1Th 5:24 Faithful is he that calleth you, who also will do it.
That is not just some 'positional' righteousness. It has its affect directly on our physical bodies and present state of mind.
Rom 12:1 I beseech you therefore, brethren, by the mercies of God, that ye present your bodies a living sacrifice, holy, acceptable unto God, which is your reasonable service.
Rom 12:2 And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.
That to me describes clearly a state of sanctification, a consistent daily holy walk before God in this present world, being a reasonable requirement by all that take the name of Christ. Will such a state be achieved by simply our own determination over time, or by faith and trust in God to perform that which He promises to perform in our lives if we seek Him with our whole heart, in this present world?