GENESIS CHAPTER 18 NOTES
V1 - "And the Lord appeared unto him in the plains of Mamre: and he sat in the tent door in the heat of the day;" - third time that the Lord appeared to Abraham previously known as Abram
[It appears to me that the speculation most likely to be correct concerning these theophanies is that they were angels, since Jesus is the only incarnation of God the NT affirms.]
V2 - "And he lift up his eyes and looked and, lo, three men stood by him: and when he saw them, he ran to meet them for the tent door, and bowed himself toward the ground," - In the previous verse it said that the Lord appeared unto him (Abraham previously known as Abram). Now it is being explained how Abraham previously known as Abram saw the Lord. He
"saw them" (the Lord and two other men). This also shows that that the Lord visually is male. Abraham ran to meet them and bowed himself toward the ground.
V4 - Abraham offers to wash the Lord's feet - honor and respect
V6 - Showing further the amount of respect and love Abraham has for the Lord
V9 - "And they said unto him, Where is Sarah thy wife? And he said, Behold, in the tent." - "...they said unto him..."
V10 - And he said, I will certainly return unto thee according to the time of life; and, lo, Sarah thy wife shall have a son..." - " And he said, I..." in the previous verse it said "they"
V12 - "Therefore Sarah laughed within herself..."
V13-14 - "And the Lord said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am I old? Is any thing too hard for the Lord? At the time appointed I will return unto thee, according to the time of life, and Sarah shall have a son." - The power of God!
V15 - "Then Sarah denied, saying, I laugh not; for she was afraid. And he said, Nay; but thou didst laugh." - Intense! The Lord will call you out to your face!
V17 - "And the Lord said, Shall I hide from Abraham that thing which I do;" - not clear on what he should hide
V20 - "their sin is very grievous" - more description of how bad it was in Sodom and Gomorrah
V22-23 - "And the men turned their faces from thence, and went toward Sodom: but Abraham stood yet before the Lord. And Abraham drew near, and said, Wilt thou also destroy the righteous with the wicked?" - Abraham stood before the Lord. "And Abraham drew near..."
V25 - "...Shall not the Judge of all the earth do right?"

I would have extremely nervous to say that in front of the Lord

V26 - "And the Lord said, If I find in Sodom fifty righteous within the city, then I will spare all the place for their sakes."
V27 - Abraham shows you how to question authority with respect
V32 - "And he said, Oh let not the Lord be angry, and I will speak yet but this once: Peradventure ten shall be found there. And he said, I will not destroy it for ten's sake." Abraham continually respects the Lord when questioning him. This is what we all need to remember to exercise regarding humility (which is in my prayers) Even when you feel you are right or are right, always exercise humility. Humility will bring forth patience, respect, and love. The Lord said he would not destroy Sodom and Gomorrah for the sake of 10 righteous people being found in the city.
[Yes, once again only a remnant was saved.]