"So God created man in his own image, in the image of God he created him; male and female he created them."
Through the gift of personhood, man could receive God's love and could love God in return. Man and his Creator could be in relationship with each other. Bu that is not all. God determined that man should have one like himself to love as well. And in His divine plan, they would become a sign and an image of the love between the Divine Persons of the Trinity and participate in God's most sublime role as Creator.