As the will of the infinite and unknowable G-d, every mitzvah is essentially beyond understanding. Yet G-d clothed His commandments in "garments" of reason, so that not only our hands and feet but also our minds and heart should be involved in their fulfillment. This is true of every mitzvah, from the most esoteric "decree" to the most logical "law". The difference is only in the subtlety of the garment.