Rav Dessler (Michtav m'Eliyahu vol II p.26) asks how a mattan Torah could be possible when Torah is infinite, aruka m'aretz midah, and the world by definition is finite. The "tzimtzum" that was necessitated to create a physical world never applied to Torah, which preceded and transcends the creation. How do you fit an infinite peg in a finite hole?
Rav Dessler answers that mattan Torah can only be understood as a nes, a miracle. Hashem has no constraints on what he can do, and so if he wills an infinite Torah into a finite human mind, it will stick. The goal of a person therefore must be to become a worthy vessel for Torah by deflating his ego and correcting his midos and hope that Hashem will award him Torah as a gift, as it is only through Hashem's grace that Torah can fully be absorbed.