Why would He tell us that if all we had to do is wait for our sanctification, fearing if we try to do anything righteous it would be of the flesh only?
I think He expects us to cooperate with His grace. His grace is sufficient yes, but our hearts and our wills and our deeds have to follow (James)
The point that I tried to make is actually neutral regarding any specific view on the whole faith vs works debate. In other words, I think it can be made to work with almost any view on that matter because that whole juxtaposition of faith vs works is not really the focus of what I tried to say. So I'll try to clarify.
What tends to happen in sanctification is that gradually more and more of our being gets aligned with Christ. This can happen in various ways, such as abandoning some sinful habits, being able to glorify God in new ways, etc. It can also happen when we begin to recognize our still existing sin more deeply and more fully. So just for now, I'll just assume that all of this is true regarding sanctification and that we probably agree. In what I write below, I'm not meaning to dispute anything about this.
At the background of the point that I'm trying to make are New Testament concepts like Christ as the new Adam and the old man / new man distinction. I'm trying to interpret and conceptualize them in a certain way that would seem to make sense of a problem that otherwise seems to arise.
Regarding the "old man", that is in some sense "Adam in us". Similarly, the "new man" would be "Christ in us". So my point is that when we become more sanctified, it is not that we are creating an instance of righteousness that is separate from Christ's righteousness. In other words, it's not a mere "copy" of Christ's perfect example or anything like that. Rather, we are "growing into" Christ's righteousness. We are already heirs of it as it has been given to us by grace, but we are "growing into it" and starting to "live from it" rather than from Adam. It is already ours by right (as the children of God) but it becomes gradually "actualized" through sanctification.
Our identity becomes more deeply bound with Christ as he indwells in us in some mysterious way, leaving less room for the "old man" which is our old identity in Adam. Let's say that you are able to give up a particular sin or at least resist it more and therefore fall into it less frequently. That "area" within your being is now open for Christ and his righteousness to be more present in. When we manage to do righteous deeds as the fruit of our sanctification, it is Christ's righteousness at work with us, not something that imitates Christ's righteousness as a "copy" separate from it. Of course we still remain fallen (although redeemed) creatures, so the "old man" still influences what we do, and so our deeds (or even thoughts) can be far from being perfectly aligned with Christ and his righteousness, but the process of sanctification is still the process moving in the
direction of being more dependent on Christ as he is more present in us.
Here's the question. I think we agree that after our death and resurrection we are completely sanctified and sin no longer has any power or presence in us at all. In this situation, are we now "independently righteous" and only seeing a past role for Christ's perfect righteousness? Or are we righteous at that point precisely because we are in perfect union with Christ so that his righteousness is now indwelling us completely so that we literally live from and by him and his righteousness?
I'm happy to try and clarify this further if necessary. And certainly I could be mistaken about this whole thing. I just can't easily bring myself to think that the end result of our sanctification moves us away from Christ and from dependence on him rather than make us live in and through Christ's perfection that will then perfectly indwell us.
I would also say that this kind of understanding seems to make better sense of the intimate metaphor of marriage between Christ and the church as his bride, and the mystical language of union with Christ and becoming one with him.