All Have Sinned
If we say we have no sin, we make God a liar. If we confess and repent of our sins, then God is faithful and just to forgive us.
Of course, we know that we have all sinned but sometimes we fall into the pattern of justifying ourselves and so not confessing and repenting of our sins.
This is to forget who we are. We are children of God through His special grace and mercy. We are sinners saved by grace. We are dependent upon God every moment. We need the Holy Spirit to enable us to obey God for in Him, we live and move and have our being.
God knows every action, every word, every thought. So, do not hide your sins but confess and forsake them and receive the grace of God which abounds above every sin.