We are made in the image and likeness of God because we can love, create, and truly choose good. We are capable of truly and freely choosing to do good and to love. Human persons are not mere reactionary creatures but a creation that, like God, can choose to do good and to love one another. Human persons are also able to know and understand goodness and love. Human persons can mirror God in the manner we know, understand, love and do good.
The Catechism of the Catholic Church:
The human person participates in the light and power of the divine Spirit. By his reason, he is capable of understanding the order of things established by the Creator. By free will, he is capable of directing himself toward his true good. He finds his perfection “in seeking and loving what is true and good” (1704).
By virtue of his soul and his spiritual powers of intellect and will, man is endowed with freedom, an “outstanding manifestation of the divine image” (1705).