David, a writer of many of the Psalms was by no means a perfect man, committing some very grievous sins. But was a man of integrity, a perfect heart, honest before God and man, a man after the heart of God. When one puts that confidence aside, that is when we fall into sin. But one with a perfect heart knows with confidence that if we sin, we have an Advocate with the Father, Christ Jesus, our Rock, the same Rock in the New that was in the Old Testament (1 Corinthians 10:4). If we repent, confessing our sins He is faithful and just to forgive us our sins and cleanse us from all unrighteousness (1 John 1:9). Not presuming upon His good graces to continue in sin, but to be free from that sin!
Read Psalm 104. David’s expression of confidence is rooted totally in his Lord God’s ability to meet his every need with enormous detail in everything He created. ...