However, I would give a caution, from personal experience, for the sake of some here who may have suffered as I did, when this longing for purity spills over into something extreme, even neurotic in my case.
It is [i]the LORD[/i] our Righteousness, not [i]our[/i] righteousness. He is our Purity, not we who are pure.
That means we can relax and let Him live in us, rather than struggling to attain perfection. ...Not to do nothing, but to give up the striving which is actually self-righteousness (= trying to be righteous in and of ourselves - even "with God's help")
(Romans 10:6-8)
'6 But the righteousness based on faith says, Do not say in your heart, “Who will ascend into heaven?” (that is, to bring Christ down) 7 or “Who will descend into the abyss?” (that is, to bring Christ up from the dead). 8 But what does it say? The word is near you, on your lips and in your heart (that is, the word of faith which we preach)'
Until les than a year ago I desperately craved for perfection, and as a result lived in an almost constant state of guilt and self-condemnation. So much so that, at one time, certain holiness preaching made me believe I wasn't born again after all. (They said one had to have something called "a new pure heart" to be born again, and my heart felt so very dirty)
Probably I misunderstood the meaning of this teaching, because of already being self-condemned. However, when attending conferencees that preached holiness, two people at different times made it plain that they also doubted very much if I was born again!
There's no need to strive for perfection, rather we can trust in the finished work of Christ.
A few years ago I did something of which I was deeply ashamed - more ashamed than usual! I'd had a bad attitude towards someone, and was later all prepared to repent (it wasn't possible to ask forgiveness from the person concerned).
But the Lord wouldn't let me repent! I realisd afterwards that it wouldn't have been true repentance, but a self-indulgent mourning at having let myself down.
Instead, He said: "What do you expect? That's what you are like left to yourself!"
Left to ourselves we [i]are[/i] 100% failures and can never be any different, but it doesn't matter any more because we aren't in ourselves but in HIM! As Paul said, "in...my flesh dwells no good thing". Worrying about our imperfections only hinders the Lord manifesting His life through us.
Instead of bringing into condemnation, as it used to, the knowledge that I can't be pure in and of myself makes me rejoice that He has done it all - so He gets all the glory!
Jeannette