God knows everything, but this does not eliminate man’s responsibility to confess his sins. Failure to do so forfeits God’s practical forgiveness.
Sin is not something man does by accident. It is something man does or allows based upon an unwillingness to stop an act before it becomes sin.
Each believer will, at some point, be confronted with the conflicting choice to obey God rather than to obey men’s anti-scriptural precepts.
