All Sin Is Against God

"For I know my transgressions, and my sin is always before me.  Against You, You only, have I sinned and done what is evil in Your sight, so that You are proved right when You speak and justified when You judge."  Psalms 51:3 (NIV)

This psalm was written by King David after the prophet Nathan had confronted him regarding his committing adultery with Bathsheba, Uriah's wife, and then had him killed. (2 Samuel 11:1-17)  David admitted that he had sinned and he knew that his sin was a sin against The Lord God.  

We know when we sin, and usually we have made a conscious effort to do so.  We never really forget that we have sinned.  In fact, we frequently remember our sins, sometimes we relive them vicariously, and we even recount them to others.  However, more often we are embarrassed and guilt ridden when we remember our sins because we knew that we were wrong and we did it anyway.  As believers, we need to understand that when we sin, we may do wrong to others, but the sin that we commit while we are doing wrong is a sin against The Lord God Almighty.  All sin is a sin against God, and it is all done in His sight.  Even though He already knows the sins that we thought, said, and did, we must still confess our sins and ask Him to forgive us.  (1 John 1:9)  We need to be cleansed of our unrighteousness and only He can do that.  Let us not let our past sins ruin our present, or our future.  Once we are forgiven, He will remember our sins no more. (Jeremiah 31:34, Hebrews 8:12, and Hebrews 10:17)

Every Man Will Receive According To His Deeds

"But for those who are self-seeking and who reject the truth and follow evil, there will be wrath and anger.  There will be trouble and distress for every human being who does evil: first for the Jew, then for the Gentile;  but glory, honor and peace for everyone who does good: first for the Jew, then for the Gentile."  Romans 2:8-10 (NIV)

In his letter to the believers in the Church in Rome, the Apostle Paul told them that the righteous judgement of God will render to every man according to his deeds. (Romans 2:5-6)  The worldly people who reject Him will incur His wrath, and the righteous people who follow Him live by His Word will be blessed.
The salvation of the redeemed believers is not based upon their works, their good works are the evidence of their salvation.  The evil deeds of non-believers provides evidence of the absence of righteousness in their lives.  Both groups will sin, but believers will feel and show remorse, confess, and repent of their sins, whereas the non-believers will not.  We all will be judged on the basis of our belief, character, and conduct.  And, His judgement will begin with those in the Church.