“The alef, written especially small in the word ‘vayikra’ in traditional Torah scrolls alludes …in some deeper sense… to God’s humility; for when God invited Moses to enter the Tabernacle, he could not because God’s glory filled the entire structure.
God, as it were, humbly contracted His infinite presence – alluded to by the small alef – to allow Moses to enter. This contraction… mirrors God’s initial act of tzimtzum which created space for finite reality to come into existence…
The paradox of the small alef… is in fact related to all of the mitzvot, each of which allows us to experience God’s infiniteness within finite time and space. It is as if every mitzvah contains a contraction of God’s infinite essence into a time and space bound action. One who performs a mitzvah with a pure heart and proper intent thus connects not only to God but to the very purpose of creation.”