Before God renamed Abram “Abraham,” he was in the process of remaking him. Yahweh’s first prophet Abram, was chosen to leave his country and his culture along with everything else in his life outside of his wife Sarai, nephew Lot and their possessions. God’s word came to him in a vision as detailed in Genesis Chapter 15.
“Fear not, Abram I am your shield; your reward shall be very great.” Abram answered, “Yahweh, what will you give me for I remain childless, and the heir of my house is Eliezer of Damascus? You have given me no offspring.” And the word of Yahweh came back to him, “This man will not be your heir: your very own son will be. Look toward heaven and number the stars if you can.” Then God said to him, “So shall your offspring be.” Abram believed God and he counted it to him as righteousness.”