The Book of Vayikra opens with God calling to Moshe, but the letter Alef at the end of the word Vayikra is written as a small Alef. The traditional approach to the small Alef here is that it points to the modesty of Moshe - a slight irony in the midst of God's honoring Moshe. Here we will give a different explanation by the Ohel Yisrael: is it about Moshe’s humility, or about God’s (so to speak) tzimtzum -"minimizing" Himself in order to facilitate Moshe's relationship with God?