What does Genesis 12:8 mean?
After the Lord appeared to Abram at Shechem and promised to give the land to Abram's descendants, Abram and his large company moved on to the region between Bethel and Ai. We're told Abram "pitched his tent" there. This phrasing seems to imply that Abram and his people settled there for some time.Also while east of Bethel, Abram builds an altar to the Lord and calls on His name there. The implication here may be that Abram began to participate in regular, formal worship of Yahweh in this place. The terminology is similar to that of Genesis chapter 4, where people are said to begin to "call upon the name of the Lord" after the banishment of Cain, and the birth of Seth (Genesis 4:26). As with the altar at Shechem, no mention is made of animal sacrifices.
Genesis 13:4 records that Abram later returned to this altar and called on the Lord's name again. This strongly suggests this altar was a lasting structure and not merely a temporary arrangement.
Genesis 12:1–9 is a landmark passage in the Bible. God calls Abram to leave his people and land behind. He also promises to bless Abram and to make his descendants into a great nation who will one day occupy the land of Canaan. Though childless, and with no obvious path to becoming a father of an entire culture, Abram begins to worship the Lord in the land of Canaan, journeying through the land and building altars to God.
Genesis 12 contains one of the key moments in the history of the world. God chooses Abram as the first step in building His people Israel. Abram obeys God's call, and heads into the land of Canaan, territory which God promises to Abram's offspring. Quickly, though, Abram fails a test of faith in the land of Egypt while seeking food in a famine. God does not fail, however, to step in to save Abram's family and protect His agenda for Abram's life.