"Blessed is the man to whom the Lord shall not impute sin" - What does "shall not impute sin" mean? Does it mean that you shall never sin again? Did Jesus die on the Cross to free us from committing sinful actions or harbouring sinful thoughts? If He did then allow me to conclude with reverence that He failed. You and I know fairly well that we can still be tempted with sinful thoughts and tempted to commit sinful actions and there will still be times when we fail.
When David described the blessed man as one to whom the Lord will not impute sin, he meant that even when this man sins, God will not count his sin against him nor punish him for his iniquity. Too good to be true? That is why David defined this man as a blessed man! And this blessed man is you and me!".
Joseph Prince - "Destined To Reign" - Harrison House Publishers, Tulsa (2007) - (p16).