Accordingly with philosophy, the concept of void is a nothingness manifested. But, in the astronomy field cosmic voids are vast spaces between filaments (the largest-scales structures in the universe), which contain very few or no galaxies.
I personally adore those ideas, and I found them really inspiring. The manifestation of nothing, and vast spaces between the largest-scales structures in the universe.
Diving into the void, is for me the experience of plunge head first into what is a zero distance with the nothingness of what we have in the intimacy of our inside, which might be an absolutely void, but an absolute sensation of freedom at the same time.