Karl Barth said this quote
“ On the basis of the eternal will of God we have to think of EVERY HUMAN BEING, even the oddest, most villainous or miserable, as one to whom Jesus Christ is Brother and God is Father; and we have to deal with him on this assumption. If the other person knows that already, then we have to strengthen him in the knowledge. If he does no know it yet or no longer knows it, our business is to transmit this knowledge to him. ”