Bible Verses About Self-Righteousness: Ineffectual for salvation

If I wash myself with snow water, And make my hands never so clean;

Yet wilt thou plunge me in the ditch, And mine own clothes shall abhor me.

For I say unto you, that except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no wise enter into the kingdom of heaven.

because by the works of the law shall no flesh be justified in his sight; for through the law cometh the knowledge of sin.