writes further: We read (Bereishit 17:5), "Your name shall no longer be called Avram; but your name shall be Avraham." In contrast, we read (Bereishit 17:15), “Hashem said to Avraham, 'As for Sarai your wife-do not call her name Sarai, for Sarah is her name." This implies that our Matriarch's name was always Sarah, but everyone called her by the diminutive "Sarai." Now, to inspire Avraham to pray harder for her to bear children, Hashem wanted to increase Sarah's stature in her husband's eyes, so He commanded that she no longer be called "Sarai." (Ma'asei Hashem)
"And you shall ascend the mountain and see the land, what it is" (13:17-18) When you will "ascend the mountain" - attain the highest levels of G-dly wisdom, then you will "see the land, what it is" - understand the true nature of physicality and realize that it is without intrinsic worth. (Noam Elimelech)
