Conscience is the faculty of human reason that makes practical judgments regarding what is morally right or wrong. In the search for truth, a person should always turn to a respected authority for enlightenment. Catholics are encouraged to turn to the teaching authority of the church, namely to what’s referred to as the magisterium. But those who act in a way that differs from the letter of the law cannot be presumed to be doing so in bad faith. The decision to do what is right or wrong always remains a personal one. Catholics are bound to follow their conscience. In the case of Catholics who have remarried without the benefit of an annulment, the Congregation for the Doctrine of the Faith teaches that Catholics whose “nullity of marriage cannot be demonstrated” are not permitted to receive the Eucharist, unless special permission has been given them to live as “brother and sister.” Read more.