God wants us to have a clear conscious

When we have done something wrong or displeasing to the Heavenly Father, God wants us to regain a clear conscious.  He has made provision for that through his mercy.  All we have to do is to confess what we have done wrong to the Lord with an honest and pure heart.  Be assured when we approach our Heavenly Father in such a manner he will forgive us our sins.  This is the process that is necessary to have the blood of Jesus cleanse us from all unrighteousness.  Also connected with this forgiveness is repentance.  Once we have confessed our wrong doings and asked God to forgive us, then we must repent.  Our repentance is reflected in our change of behavior.  In other words, we start doing what God says do.