"Yea doubtless, and I count all things but loss for the excellency of the knowledge of Christ Jesus my Lord: for whom I have suffered the loss of all things, and do count them but dung, that I may win Christ,And be found in him, not having mine own righteousness, which is of the law, but that which is through the faith of Christ, the righteousness which is of God by faith:
That I may know him, and the power of his resurrection, and the fellowship of his sufferings, being made conformable unto his death;
If by any means I might attain unto the resurrection of the dead.
Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus.
Brethren, I count not myself to have apprehended: but this one thing I do, forgetting those things which are behind, and reaching forth unto those things which are before,
I press toward the mark for the prize of the high calling of God in Christ Jesus.
Let us therefore, as many as be perfect, be thus minded: and if in any thing ye be otherwise minded, God shall reveal even this unto you.
Nevertheless, whereto we have already attained, let us walk by the same rule, let us mind the same thing.
Brethren, be followers together of me, and mark them which walk so as ye have us for an ensample.
(For many walk, of whom I have told you often, and now tell you even weeping, that they are the enemies of the cross of Christ:
Whose end is destruction, whose God is their belly, and whose glory is in their shame, who mind earthly things.)
For our conversation is in heaven; from whence also we look for the Saviour, the Lord Jesus Christ:
Who shall change our vile body, that it may be fashioned like unto his glorious body, according to the working whereby he is able even to subdue all things unto himself." -- Philippians 3:8-21
If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness." -- 1 John 1:8-9"If we say that we have no sin, we deceive ourselves, and the truth is not in us.
Men sin every day of their lives. But we have His promise that every one of those sins has been forgiven at the cross of Calvary.
Then said he, Lo, I come to do thy will, O God. He taketh away the first, that he may establish the second. By the which will we are sanctified through the offering of the body of Jesus Christ once for all. And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins: But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God; From henceforth expecting till his enemies be made his footstool. For by one offering he hath perfected for ever them that are sanctified. Whereof the Holy Ghost also is a witness to us: for after that he had said before, This is the covenant that I will make with them after those days, saith the Lord, I will put my laws into their hearts, and in their minds will I write them; And their sins and iniquities will I remember no more. Now where remission of these is, there is no more offering for sin." -- Hebrews 10:8-18"Above when he said, Sacrifice and offering and burnt offerings and offering for sin thou wouldest not, neither hadst pleasure therein; which are offered by the law;
None of that says that the stain of sin remains after Baptism.