The big change from Noah’s generation to Avraham’s is not in the patriarchs; it’s G-d’s . The first 20 generations of humanity are based on the Divine supposition that it is possible to create a world based on a G-dly ideal. With Avraham, G-d changes his tack. Instead of trying to create a perfect world in which humans will diligently comply, G-d chooses to put Avraham through his paces, giving him the famous 10 trials of faith which will prove his worthiness to be the representative of G-d on earth. Knowing the context and the rules of the game through his great great….grandfather, Avraham is well suited to the task. He therefore transcends the Heavenly expectations; he will not only become a faithful servant of G-d, but also a vocal advocate for humanity, taking on our cause when we turn out to be, well, human.
Rabbi/Hazzan David B. Sislen