They said therefore to him, "Who are you? Give us an answer to take back to those who sent us. What do you say about yourself?"

 But there is a human side to this. What God offers, man has to appropriate. A human father may offer his son his love, his advice, his friendship, and the son may refuse it and prefer to take his own way. It is so with God; God offers us the right to become sons but we need not accept it. 