One with mind was a relatively easier state to reach. In fact, without even trying to comprehend it, Dyon had.
Like the receptionist had said all those months ago, often times, clues to comprehending intents were tied to the name given to their level. One with mind was exactly that, it was a state of comprehension that allowed your mind to accept the will. However, it was still much shallower than one with heart.
You could think of one with mind as a state of understanding, while one with heart was a state of acceptance. But, it was obviously very difficult to come to a compromise like this with a will such as death.
One could easily understand that they were likely to die. But, just how many would accept such a thing?