The breaking was necessary because without it we would just hang in the same state, in the middle between egoism and sanctity, neither here nor there. And while tied to a single state, one is not able to change anything. In order to walk, it is necessary to keep moving the feet so that one is far from the other; there has to be a difference between two states. In that case, we shift from the state we perceive as undesirable and bad to a better one.
In other words, I keep moving from a poor state to a good state. It is similar to walking: the foot that was in the front remains behind now, while I put the other foot forward to make a step further. And then I make one more step, and yet another one, alternating the feet, each time leaving behind what used to be ahead.
I don’t place the other foot next to the first, adding to the same state; I keep putting it further ahead. The same rule applies in the spiritual world. The negative I had I turn into plus, and therefore descent always promotes ascent.
I always have three states: the middle, the previous, and the future one.
From the 3rd part of the Daily Kabbalah Lesson 1/1/13, The Study of the Ten Sefirot