Much like Job "Though he slay me yet will I trust him." God placed Abraham in a situation that most of us would fail, almost instantly. "Kill my kid?..." "How could God ask me to kill my kid?" But Abraham trust God enough to go up that mountain trusting that.
The Father of the faithful, a man listed in the Hall of Faith, Abraham is truly a man that goes down in the bible's Who's who. To understadn where he came from will set the ground work for your understanding of much of what will transpire in the 65 books that follow Genesis.