Personally, I can't fathom the idea of nothingness in my small mind. Apparently, science would back me up in that there is no such thing as nothingness. All matter is made up of atoms. Atoms are 99.99999999% empty space. However, even this empty space is not really empty according to science. It is made up of quark and gluon field fluctuation. In other words, all matter and anti-matter is simply just energy in one form or another.
Energy can never be created or destroyed. Einstein proved this in his general theory of relativity and e=mc2. Therefore we are all Source energy manifesting itself through the created dimensions of space and time in various forms as material existence. We, and all things material, are energy appearing in form, a projected illusion of the conscience mind. This source energy is what the Christian tradition might call God. Science refers to it as singularity. This original source energy, singularity, or spirit is true essence and this true essence is in and through each and every one of us. It is us and we are it.
If there is a nothingness, this is it! And it is the most wonderful nothingness that ever existed!