You show me one person who never sins and is completely pure in heart, if there is no such person on earth then quoting never sinning scrpture is pointless and honestly does not make you look good
Hence the need for grace...
Rom 3:23 For all have sinned, and come short of the glory of God;
1Jn 2:1 My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous:
1Jn 2:2 And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world.
1Jn 2:3 And hereby we do know that we know him, if we keep his commandments.
1Jn 2:4 He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him.
1Jn 2:5 But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him.
1Jn 2:6 He that saith he abideth in him ought himself also so to walk, even as he walked.
Christ gave His life in our stead, therefore we should strive not to sin (not to transgress the Law) but if we do, we have Christ as our advocate to offer that sacrifice in our stead to forgive us.