Here I'll start:
To see a World in a Grain of Sand
And a Heaven in a Wild Flower
Hold Infinity in the palm of your hand
And Eternity in an hour
-William Blake
Chattering finch and water-fly
Are not merrier than I;
Here among the flowers I lie
Laughing everlastingly.
No: I may not tell the best;
Surely, friends, I might have guessed
Death was but the good King's jest,
It was hid so carefully.
-G.K. Chesterton
Regarding the latter, if I may, I'd like to recommend Allan Watts beautiful words in:
Wooow, finally had the courage to do my first post ?
May the present be with you.