A high quality conscience will produce a high quality spiritual life. It will manifest a much richer emotional, mental and spiritual life, whereas a lower quality conscience tends to precede a spiritual life of less quality.
You are the only one who can hear your conscience, and you are the only one who must pay the consequences for it when you don’t. You will grow in consciousness the moment you begin to listen, trust and follow your conscience.
Check your decision making process. If you feel good or at ease about a decision you are about to make, then you could say that your conscience is clear. If you do not feel good about a decision you are about to make, or you feel guilty, or any other form of negative emotion, then you know that your conscience is far from clear. You will grow in consciousness each time you examine your conscience this way. If it is clear then you can be at peace with yourself. If your conscience is not clear, then do what is necessary to rectify the situation.