The gift God gave human beings to be able to use reason in order to judge right from wrong. Conscience is God’s voice in our hearts. We have a responsibility to educate ourselves and inform our conscience with prayer and God’s word about what is truly good.
Intellect
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The intellect is a person's ability to know and understand. It is one of the powers of the human soul.
Passions
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Desires or emotions. They are responses of the body and soul to some experience of the senses and are neither morally good nor morally bad. They only take on a moral quality when we use our intellect and will to direct them for some morally good or morally bad purpose.
Will
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The will is a person's ability to freely choose and act. It is one of the powers of the human soul.