The Fourth Lateran Council says: "He who acts against his conscience loses his soul".Unlike all other earthly creatures,we possess a God-given capacity to know ourselves.We can, in a sense, stand back and look at ourselves and make moral judgments. Acting as an internal witness bearer,or judge,our conscience can examine our actions,our attitudes,and our choices.It may guide us toward a good decision or warn us against a bad one.It may comfort us for choosing well or punish us with sharp pangs for choosing poorly.Deep within his conscience man discovers a law which he has not laid upon himself but which he must obey.Its voice,ever calling him to love and to do what is good and to avoid evil,sounds in his heart at the right moment"(GS 16)."Conscience is a judgment of reason whereby the human person recognizes the moral quality of a concrete act...In all that he says and does,man is obliged to follow faithfully what he knows to be just and right"(CCC 1778).The book is good for Religious and clergy during and after formation.It can be used in colleges and University in Philosophy Theology, Religion and Sociology.It is good also for all Religions to understand more on conscience