If there is no heaven or hell after we die, if there is only nothing, the same kind of nothing that existed before we were born, then we return to nothing when we die. Therefore, it seems to me we have to make full use of what little time we have.
Realizing this is IT, that we have no second chance, no reincarnation, no opportunity to try life again, we have to make the most of this life. Each one of us is alive as only a spark of life in a long existence of the Earth and the universe.
I want every moment of my life to experience all my sense. I want to exist as a fully human being, having access to all my sensory organs. I want access to as much learning as I can possibly squeeze into my incredibly short time on the Earth. I want to be earnestly engaged in living, and in seeing that every living being has the same opportunity as I. A humongous change has to occur in culture for this to happen.