The most obvious hindrance to a potent prayer life is the presence of unconfessed sins in the heart of the one who is praying. Because our God is holy, there is a barrier that exists between Him and us when we come to Him with unconfessed sin in our lives. “But your iniquities have separated you from your God; your sins have hidden his face from you, so that he will not hear” (Isaiah 59:2). David concurred, knowing from experience that God is far from those who try to hide their sin: “If I had cherished sin in my heart, the Lord would not have listened” (Psalm 66:18).