1. Keep a clear conscience.
1 Peter 3:15–16. But sanctify the Lord God in your hearts, and always be ready to give a defense to everyone who asks you a reason for the hope that is in you, with meekness and fear; having a good conscience, that when they defame you as evildoers, those who revile your good conduct in Christ may be ashamed.
2. Keep a clear conscience before God and men.
Acts 24:16. “This being so, I myself always strive to have a conscience without offense toward God and men.”
3. Hold to the truths of the faith.
1 Tim. 3:9. Holding the mystery of the faith with a pure conscience.
4. A conscience can be seared.
1 Tim. 4:2. Speaking lies in hypocrisy, having their own conscience seared with a hot iron.
5. You can have a clear conscience and rest in the heart.
Prov. 3:21–26. My son, let them not depart from your eyes—Keep sound wisdom and discretion; So they will be life to your soul And grace to your neck. Then you will walk safely in your way, And your foot will not stumble. When you lie down, you will not be afraid; Yes, you will lie down and your sleep will be sweet. Do not be afraid of sudden terror, Nor of trouble from the wicked when it comes; For the Lord will be your confidence, And will keep your foot from being caught.
6. Christ will give you a clear conscience.
Heb. 9:14. How much more shall the blood of Christ, who through the eternal Spirit offered Himself without spot to God, cleanse your conscience from dead works to serve the living God?
7. A guilty conscience can be cleansed.
Heb. 10:22. Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience and our bodies washed with pure water.
 Kruis, J. G. (1994). Quick scripture reference for counseling (electronic ed.). Grand Rapids, MI: Baker Book House.