A man needs to satisfy his conscience towards God by not despising God’s precepts, even those concerning things which are not seen by men or those things for which one is not accountable to men. For example, did he neglect his prayers? If an evil thought came into his heart, was he vigilant and did he keep control of himself or did he entertain it? He sees his neighbor saying or doing something; does he suspect it is evil and condemn him? To put it simply, all the hidden things that happen inside us, things which no one sees except God and our conscience, we need to take account of. This is what I mean by our conscience towards God.
St. Dorotheos of Gaza