It sounds like loneliness but in a way, it's pretty similar to that as well, when we say nothingness we mean we are left with nothing. It's like the feeling of being completely empty and begging for something, more of a survival battle.
If we look at another side of it, it gives you that vibe that since I don't have anything to lose now, let me take a step and do something big, it gives you that courage and hope that I have to achieve something as I have nothing at the moment.
It can create wonder if we get something out of nothing and the kind of joy which we get after that is priceless. Hope is the best medicine that helps during that period as it'll give a required boost up to perform and make nothingness to fullfillness.
