Conscience is a judgment of reason whereby the human person recognizes the moral quality of a concrete act that he is going to perform, is in the process of performing, or has already completed. It is not a matter of personal decision about what is good or evil, but upon the objective moral order willed by God, binding on human beings and known through reason (natural law) and divine revelation (Scripture, Tradition & Magisterial teaching). The obligation to the Church’s teaching flows from the supernatural virtue of Faith, since belief in Christ is also belief in the Church and in Christ’s promises to the Church. This teaching can be found in Sacred Scripture and Sacred Tradition, which includes the formal teaching of Popes and Councils regarding what has been revealed. It also includes what has been commonly taught in the Church, as the entire Church cannot error. In moral matters the place where you can find this teaching is in the accounts of the moral tradition by authors of noted orthodoxy and acceptance by the Magisterium. It is NOT found in individual authors whose theological opinions are outside of that common moral tradition of the Church. For example, historically the Church has condemned both laxity and rigidity in moral decision making, and in our time consequentialism and proportionalism. More On Conscience