"Child of God," is a phrase referred auspiciously to those seen as special in relationship with the spiritual realm, without any prior understanding or reasoning outside of this assumption. It is also left to those called, thusly, to address this call one way or another. To learn and to know one's self is immeasurable, in the least. To finally come to this conclusion in one's relationship with God, the Creator could be just the growth of a child into full adulthood. Peace is with you.