It's a poem by the guy who did Winnie the Pooh, AA Milne. It's from his book When We Were Very Young. And I didn't even know it had been put to music till I googled it to remind myself which Milne book it was in.
Some of us are easily amused....I'm one of those.
"My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks