The writer of Hebrews deals with this issue: Hebrews 10
Therefore, brethren, since we have confidence to enter the holy place by the blood of Jesus, by a new and living way which He inaugurated for us through the veil, that is, His flesh, and since we have a great priest over the house of God, let us draw near with a sincere heart in full assurance of faith, having our hearts sprinkled clean from an evil conscience and our bodies washed with pure water.
Let us hold fast the confession of our hope without wavering, for He who promised is faithful;
We have confidence because He is faithful! No where does scripture indicate that the redeamed need to clean-up their lives or begin to be more faithful do be more acceptable. As a matter of fact scripture indicates quite the opposite. God sees our self earned righteousness as nothing more that filthy, stinky rags.
Hebrews drives this point painfuly home with these comments:
Anyone who has set aside the Law of Moses dies without mercy on the testimony of two or three witnesses.
How much severer punishment do you think he will deserve who has trampled under foot the Son of God, and has regarded as unclean the blood of the covenant by which he was sanctified, and has insulted the Spirit of grace?
The bottom line is this. If the blood of Jesus is not enough, there is no hope for you! Jesus paid it all! God sees our efforts to add to what Jesus did as an afront. It is simply another example of Adam's original sin of attempting to place himself in God's position! You don't want to go there!