Elisabet Sahtouris said this quote

“ Caterpillars chew their way through ecosystems leaving a path of destruction as they get fatter and fatter. When they finally fall asleep and a chrysalis forms around them, tiny new imaginal cells, as biologists call them, begin to take form within their bodies. The caterpillar’s immune system fights these new cells as though they were foreign intruders, and only when they crop up in greater numbers and link themselves together are they strong enough to survive. Then the caterpillar’s immune system fails and its body dissolves into a nutritive soup which the new cells recycle into their developing butterfly. The caterpillar is a necessary stage but becomes unsustainable once its job is done. There is no point in being angry with it and there is no need to worry about defeating it. The task is to focus on building the butterfly, the success of which depends on powerful positive and creative efforts in all aspects of society and alliances built among those engaged in them. ”