Abraham the Evangelist

I was preparing for my faith family's bible study and I came across a couple of interesting insights about Abraham in a commentary on Genesis. The first point involved Genesis 12:4-5

So Abram went, as the LORD had told him, and Lot went with him. Abram was seventy-five years old when he departed from Haran. And Abram took Sarai his wife, and Lot his brother's son, and all their possessions that they had gathered, and the people that they had acquired in Haran, and they set out to go to the land of Canaan. When they came to the land of Canaan, (Genesis 12:4-5 ESV)[bolding mine]

When I first read the passage about "people that they had acquired," I thought Moses meant slaves. However Allen P. Ross in his commentary pointed out translating that phrase as "slaves" would probably be incorrect. Ross wrote the following observation about Genesis 12:5.

Tucked away in this verse, easily overlooked, is the expression "and the people [nepes] whom they had acquired [`asa] in Haran." This expression probably does not refer to the acquisition of slaves, for the Hebrew word nepes would not likely be used for that. And it certainly does not refer to their children, because Sarai was barren until Isaac's birth (21:1-7). Cassuto argues that this expression probably refers to proselytes (ibid., p.310). If he is correct, then the narrative implies that, already in Haran, Abram had been sharing his faith in the Lord. (p. 265, Creation and Blessing: A Guide to the Study and Exposition of Genesis , Allen P. Ross)

I thought, "Cool, Abraham shared his faith in the friendly environs of Haran with his family around him." However, another observation in the commentary gave me an insight into Abraham's boldness. I read next in Genesis 12:7-9:

Then the LORD appeared to Abram and said, “To your offspring I will give this land.” So he built there an altar to the LORD, who had appeared to him. From there he moved to the hill country on the east of Bethel and pitched his tent, with Bethel on the west and Ai on the east. And there he built an altar to the LORD and called upon the name of the LORD. And Abram journeyed on, still going toward the Negeb. (Genesis 12:7-9 ESV)

Abraham's responded to God's further revelation about the land going to his descendants was worship and calling upon the name of the Lord. In Ross's commentary the verb "called upon" can mean more than just prayer.

The response to God's confirming appearance was worship. The idea of sacrifice, presumed here with the building of an altar, continues the ancient form of expressing gratitude and devotion. But at the second mention of his building an altar to worship the Lord is the report that he "made proclamation of the Lord by name..." The expression, first used in Genesis 4:26 refers to the public proclamation of faith in the Lord. The expression is used in the Bible for prayer or for praise, but in Mosaic material it seems to be broader (although a public proclamation of the faith could include prayer and praise) Martin Luther translated it "preached" (predigte), a good rendering in this context.(p. 267, ibid)

So in summary, Abraham built an altar and preached about the one true God in the country of the pantheistic and antagonistic Canaanites. Abraham was bold in his faith even at this early stage. He messed up a few times, but Abram displayed a rare quality of faith that is praised in Hebrews 11.