Thomas Aquinas believed that conscience is the God-given faculty of reason - all human beings seek to do good and avoid evil, and have a natural orientation towards the good. Aquinas argues that what is innate for humans is not the voice of God directly telling us what to do, but it. is the God-given faculty of reason. Aquinas believed that the conscience is fallible, meaning that it can be mistaken, and there are two reasons why it might make a wrong decision: if it is ignorant of the moral law, in which case Aquinas says that the person is guilty of sin, or if it is not informed about the facts of the case, in which case the person is not responsible for the mistake, for example if someone took a newspaper thinking it was free, when it actually was for sale. Aquinas also holds that the conscience should always be followed, and that even if your conscience makes a mistake, what the conscience dictates is true to the individual concerned, and and the truth must be followed. Truth comes from God, ands to go against your conscience is going against God