I guess I can see the littlest of what the Komarna Rebbe meant when he said he didn't write a peirush on Tikkunei Zohar because it was too dense.
Not long ago, in the daily Tanya, Rebbe Shneur Zalman explained how a father can only give over a lesson to his son if he first refines his ideas to a very basic level, one which will be palatable to his son's lesser intellect. Secondly, the excitement/desire/love with which the father gives over the lesson to his son has a tremendous impact on how well the son can receive and retain the lesson.
In Elul and on Rosh HaShanah especially, we need to recognize how much HaShem truly loves us that he created this whole world, everything in existence, as a means to make his infinite kindness palatable to our limited selves.
Not only did he bring down the infinity of Torah to a level of ink scrawled on parchment, but He loves us so much that he gave us the Torah as well as six hundred and thirteen mitzwoth with which we may bind ourselves to Him.
When we sin, when we violate part or one of those six hundred and thirteen mitzwoth, it isn't that we are doing something wrong, that we're behaving badly. It is that we are limiting ourselves beyond even our nature. HaShem has come all the way down to earth to be with us, to look us in the eye, and we are unwittingly closing those eyes.
In our generation we no longer know what it means to sin intentionally. To sin intentionally you need to know what you are missing out on. Do we really know? No.
The Komarna Rebbe quotes the Arizal who explains to Rav Hayyim Vital, that we are beings so thoroughly mired in physicality that we can't possibly reach a lofty level, yet every mitzwah we do is all the more precious because of that. The Komarna Rebbe goes on to say that if the Arizal was explaining this about the time in which he lived, how much the moreso nowadays? In fact, the Rebbe goes on, I testify that in our day and age, every Jew, and especially all Bnei Ashkenaz are considered tinok she'nishba, an innocent child who knows nothing and cannot be held accountable for his sins. (Netiv Mitzwotecha, Netiv Emunah:6:10)
HaShem loves us so much. We love Him too. The goal of every mitzwah you do from now till Rosh HaShanah is to open your heart and feel that love, both Him for us and we for Him.