|If I had cherished sin in my heart,|
the Lord would not have listened;
but God has surely listened
and heard my voice in prayer
|If I regard iniquity in my heart, the Lord will not hear me: But verily God hath heard me; he hath attended to the voice of my prayer.|
Ongoing sin in a believer's life hinders effective prayer (Ps. 32). This is especially true if we cherish certain unconfessed sins in our lives.
Proverbs 23:17 says "Do not let your heart envy sinners, but always be zealous for the fear of the LORD."We are commanded not to cherish sin or envy sinners.