I hear the accuser roar of ills that I have done;
I know them well, and thousands more Jehovah findeth none.
Though the restless foe accuses - sins recounting like a flood;
Every charge our God refuses; Christ has answered with His blood.

Author unknown

Gems from my reading

Every circumstance in Genesis 18 speaks of a righteous man's open communion with God. The Lord and the two angels drew near Abraham in human form. They readily accepted Abraham's service, speech, and friendship. In the realm of divine fellowship, Genesis 18 is in striking contrast to God's disposition towards Lot in Genesis 19. In chapter 19, God does not personally visit carnal Lot, nor do the angels appear as men any longer, but as "angels." Even the angels are standoffish and initially refuse Lot's company and provisions. God is not mocked - our carnality necessitates distance and reduced familiarity with Him.

Warren Henderson in Seeds of Destiny (A Genesis Devotional)