Stuffed the fat until the crease Couldn’t eat another leaf And when the evening comes to bear Silky covers do weave with care, Stiffened legs and hardened soul, From which the wings of flight may grow The end of dusk comes dark night, Caterpillar finds wings of flight. Slowly as the dawn would come, Caterpillar age was done And in place, the meta soul, Greets the sun so colorful. What secret has this butterfly? To be reborn it had to die The secret that the flowers keep, From stems to leaves, flowers they reap. Cover they, in spring of Earth, Herald another meta birth, The eyes of humans weep and cry, But do they know their soul will fly?
Your metamorphosis theme is a potentially very powerful one, but I think you need one or two unexpected observations in there, something that hasn't been said before, something to jolt the reader a little bit and make us think. Maybe your last two lines could be the basis for one, I don't know. And personally, I would give up on the rhyming.