I really just don't know what you mean by that. I imagine a world in which no-one dies and someone asking, 'What's life?' and people still quite meaningfully pointing to living things and going 'Well, it's that.' Just as I can imagine that people who haven't grieved can still love.
Grief and death perhaps serves as a proof of love and life, I suppose. If they weren't there what would you lose? But I don't see how they're meant to have IFF relationships.