Reminds me of what happened during my latest breathwork experience. As happens after about 10 minutes hyperventilating, my hands became stiff and painful, and I slammed them on the ground several times to try and ease the pain. As I did I became aware of the grass I was touching. The sun was setting. Light was shining through the grass blades.
I felt a feeling of sorrow, because I thought of how one day when I die I'll be giving up my hands, all the senses I have. Then I realised I'll be giving them to the grass, to the trees, to the bacteria, the fungi, the animals. That even if I wouldn't see the sun anymore the grass would, and the grass would be part of me.
I lay back and kept hyperventilating, suddenly I felt my husband was with me spiritually, and we were making love. I was crying-laughing with the intensity of the love I felt.
And then it was like an oscillation - my love for him was the universal love, and I realised that all of life was love, that love made all suffering worth it, that all beings loved and that was what made life keep going in the face of death. That everything was impermanent and yet love was eternal.