If we look even to the lowliest creatures on earth, we see
an image of the process of regeneration in the miraculous
transformation of silkworms, and of many other grubs
and caterpillars into nymphs and butterflies, and of other
creatures that in time are embellished with wings. In
brief, the whole world on every level of existence is full of
symbols and emblems of regeneration.
—True Christianity 687:3