I am reading a fascinating book called "The Secret Life of Plants" and this passage really gives a different and interesting perspective of man's purpose in this world...
"Was it not one of the ultimate purposes of the human bodies to serve vegetal life, surrounding it by emitting carbon dioxide for the plants to breathe, and manuring them with human bodies after death? Did not flowers and trees finally consume man and, by combining his remains together with raw earth, water, air, and sunlight, transform and transmute human bodies into the most glorious forms and colors?" - Gustav Theodor Fechner (1839)
I really love how this makes me feel completely tiny in this world, yet full of purpose in this life.
