If you reach that point, this will be your choice: Do you want to get closer and closer to Hashem - even if it will mean dying for it? Or do you want to return to the lowly world? What do you choose?
True, this is a level that most people cannot be on. Most people are not willing to die for more closeness with Hashem. But we see that even during the rest of the year, where we are nowhere near this level of mesirus nefesh, at least we have are able to have some kind of intention when reciting Shema that we are willing to have mesirus nefesh, to be willing to die for Hashem; and even if we don’t really mean it when we think about it, as long as we had tiny sliver of earnest intention for this as we said it, we have a greater chance of reaching this level on Yom Kippur, and to really want it.
If you are willing to die to reach more closeness with Hashem on Yom Kippur, this is like the atonement of death, which is the greatest level of atonement, which atones even for the most severe sin of all, the sin of chilul Hashem. But this entails a deep power of choice that you make on Yom Kippur, of what you really, really want.
