8 So Abram said to Lot, “Please let there be no strife between you and me, nor between my herdsmen and your herdsmen, for we are brothers. 9 “Is not the whole land before you? Please separate from me; if to the left, then I will go to the right; or if to the right, then I will go to the left.” 10 Lot lifted up his eyes and saw all the valley of the Jordan, that it was well watered everywhere–this was before the LORD destroyed Sodom and Gomorrah–like the garden of the LORD, like the land of Egypt as you go to Zoar. 11 So Lot chose for himself all the valley of the Jordan, and Lot journeyed eastward. Thus they separated from each other. 12 Abram settled in the land of Canaan, while Lot settled in the cities of the valley, and moved his tents as far as Sodom. 13 Now the men of Sodom were wicked exceedingly and sinners against the LORD.
14 The LORD said to Abram, after Lot had separated from him, “Now lift up your eyes and look from the place where you are, northward and southward and eastward and westward; 15 for all the land which you see, I will give it to you and to your descendants forever. 16 “I will make your descendants as the dust of the earth, so that if anyone can number the dust of the earth, then your descendants can also be numbered. 17 “Arise, walk about the land through its length and breadth; for I will give it to you.” 18 Then Abram moved his tent and came and dwelt by the oaks of Mamre, which are in Hebron, and there he built an altar to the LORD.
After Abram went back to the beginning, he was much more focused on what God had promised. Thus, when there was strife between himself and Lot, and it became necessary to separate, he didn’t concern himself with which land was better. He knew that God would take care of him, no matter where he dwelt in Canaan. He resolved a very sticky situation by keeping his eyes on the promise, and not getting concerned with his own ‘needs’.