It is therefore an act, a judgment, not only on the speculative plane but also on the practical one, hence on an action to be carried out. The final judgment of the syllogism becomes binding to the extent to which it faithfully reproduces the objective standard that is God's law, in its various manifestations. Only the law of God, in fact, communicated to us by reason, can have binding force and tell us if an act is good and therefore to be done, or if an act is bad and therefore to be avoided. He who neglects this duty, is well as acting against the dignity of his own person which finds its perfection in God, becomes responsible for the evil he may do because of his ignorance. For man has in his heart a law written by God.
Conscience is the most secret core and sanctuary of a man.
There he is alone with God, whose voice echoes in his depths. In a wonderful manner conscience reveals that law which is fulfilled by love of God and neighbour. In fidelity to conscience, Christians are joined with the rest of men in the search for truth, and for the genuine solution to the numerous problems which arise in the life of individuals and from social relationships. Hence the more that a correct conscience holds sway, the more persons and groups turn aside from blind choice and strive to be guided by objective norms of morality. Conscience frequently errs from invincible ignorance without losing its dignity.