Our Know Sin :

[Pastor Dr. Michael M Sherrod]

The only sins we can confess are our known sins,  but as (1John 1:8 and 10) suggest,  as long as we are in this life, we will never be perfect or without sins. There will always be areas that need change. The promise is that as long as we are confessing our known sins and seeking earnestly to walk with the Lord, He not only forgives the sins we confess, but He cleanses us from all sin and fellowship is maintained. Cleansing us may also refer to the transformation process that confession is designed to bring about as it cause us to deal with sin and seek the fellowship and strength of God.

(Psalms 32:5) " I acknowledged my sin to  Thee, And my iniquity I did not hide; I said,  " I will confess my transgressions to the Lord " ; And Thou didst forgive the guilt of my sin.Selah."