Nefesh HaChayim, Reb Itzele's Long Annotation

So too our holy Torah, even though the most supernal of supernal sparks are concealed within it, within it can also be found levels that are the roots of the vessels of action, speech and thought, corresponding to a person’s Neffesh, Ruakh and Neshama. Hidden within them are the most hidden of the hidden, revealed to us via revealed aspects, the learning of which enables us to perform the commandments. Via the Torah and the commandments (written and oral Torah), we can draw upon and within ourselves tzellem from concealed worlds, and d’moot for the actions of our bodies from the revealed worlds. For that reason it also stated “sealed away”, and it causes it to become “revealed”, per His (blessed be His name) desire that we should grasp the hidden via the revealed. And this is only from our perspective, to shield it from the Other Side with regards to the performance of the commandments. And in any case, the light shining within it illuminates the supernal roots.