Human beings are capable of doing the right thing because God is just. God's rational nature is important for another reason: it means that God is not unfaithful to God's promises. If God were unreliable and capricious human beings could never know what was true and what was not, what was good and what was bad, what was right and what was wrong. Because God is rational God has created a rationally ordered universe. God has gifted human beings with the capacity to reason and to gain insight into the rational order. Christians are therefore able to believe that there is a truth in any given situation and that truth is accessible, at least in part, to human beings through the use of their reason. God can be trusted to honour the promises made to human beings. Human beings, as images of God are called to be just, ensuring that God's deepest desires for humankind and the world are realized.
Human beings are created free. How we choose to think about and treat one another reflects how we think and feel about ourselves, about the meaning and purpose of life and about God (Bell, 2007). The Christian vision of the human person promotes and protects the dignity of the human person; interpersonal relationships characterized by integrity and justice; and physical, emotional, relational and spiritual health and safety. It does so because these protections are necessary if we are to realise the fullness of our freedom. The sexual ethics that arises from the Catholic perspective helps us to discern what is good and bad, and what is morally right and wrong, in the wider culture, so that we freely choose to direct our moral responsibility to human flourishing.
The Christian tradition calls this process of learning how to be free the formation of conscience. 'Conscience is the interior space of our relationship with God, who speaks to our heart and helps us to discern, to understand the path we ought to take, and once the decision is made, to move forward, to remain faithful' (Pope Francis, 2013). Formation of conscience involves learning how to make free and responsible moral decisions based on compassion, sound knowledge and moral reasoning. Pope Francis, in Amoris Laetitia (2016) paragraphs 259-279 writes insightfully and comprehensively about the ethical formation of children.