A Reconciled Conscience
In the moral sense, "conscience" (not to be confused with conscious, which simply means to be aware i.e. to be awake) may be defined as the ability to differentiate right from wrong. However, in a Christian sense, it's a matter of the ability to differentiate genuine right from wrong: "14:12 There is a way which seemeth right unto a man, but the end thereof are the ways of death" (Proverbs 14:12; see also I Did It My Way).
"And all things are of God, who hath reconciled us to himself by Jesus Christ ... I trust also are made manifest in your consciences"
"5:10 For we must all appear before the judgment seat of Christ; that every one may receive the things done in his body, according to that he hath done, whether it be good or bad" (2 Corinthians 5:10 KJV) is a plain-as-day statement that everyone will judged, in due time (see When Will You Be Judged? to understand when judgment will happen; see also Could Christ Return Tonight?).
"5:1 For we know that if our earthly house of this tabernacle were dissolved, we have a building of God, an house not made with hands, eternal in the heavens [see Mansions]. 5:2 For in this we groan, earnestly desiring to be clothed upon with our house which is from heaven: 5:3 If so be that being clothed we shall not be found naked. 5:4 For we that are in this tabernacle do groan, being burdened: not for that we would be unclothed, but clothed upon, that mortality might be swallowed up of life. 5:5 Now he that hath wrought us for the selfsame thing is God, who also hath given unto us the earnest of the Spirit.
"5:18 And all things are of God, who hath reconciled us to himself by Jesus Christ, and hath given to us the ministry of reconciliation" (2 Corinthians 5:18 KJV) portrays how The Messiah is the atoning High Priest of humanity (see Why Blood? and What Is Jesus Christ Doing Right Now?).
"5:11 Knowing therefore the terror of the Lord, we persuade men; but we are made manifest unto God; and I trust also are made manifest in your consciences. 5:12 For we commend not ourselves again unto you, but give you occasion to glory on our behalf, that ye may have somewhat to answer them which glory in appearance, and not in heart. 5:13 For whether we be beside ourselves, it is to God: or whether we be sober, it is for your cause. 5:14 For the love of Christ constraineth us; because we thus judge, that if one died for all, then were all dead: 5:15 And that he died for all, that they which live should not henceforth live unto themselves, but unto him which died for them, and rose again [see Christianos].
Fact Finder: Christ has made possible our reconciliation to The Father by means of His atoning Sacrifice. But how must people reconcile themselves to Christ so that His Sacrifice takes effect (i.e. Christ died for repentant sinners; unrepentant sinners are going to be cast into the lake of fire)?