“Seeing that Abraham shall surely become a great and mighty nation, and all the nations of the earth shall be blessed in him?”
King James Version (KJV)
18:17 Shall I hide from Abraham that thing which I do - Thus doth God in his councils express himself after the manner of men, with deliberation. The secret of the Lord is with them that fear him. Those that by faith live a life of communion with God, cannot but know more of his mind than other people. They have a better insight into what is present, and a better foresight of what is to come.
18:19 I know Abraham that he will command his children, and his household after him - This is a bright part of Abraham's character. He not only prayed with his family, but he taught them, as a man of knowledge; nay, he commanded them as a man in authority, and was prophet and king, as well as priest, in his own house. And he not only took care of his children, but of his household: his servants were catechized servants. Masters of families should instruct, and inspect the manners of all under their roof. And this is given as the reason why God would make known to him his purpose concerning Sodom; because he was communicative of his knowledge, and improved it for the benefit of those that were under his charge.