Nec species sua cuique manet, rerumque novatrix ex aliis alias reddit natura figuras. nec perit in toto quidquam, mihi credite, mundo, sed variat faciemque novat, nascique vocatur incipere esse aliud, quam quod fuit ante, morique, desinere illud idem. cum sint huc forsitan illa, haec translata illuc, summa tamen omnia constant. No species remains constant: that great renovator of matter Nature, endlessly fashions new forms from old: there's nothing in the whole universe that perishes, believe me; rather it renews and varies its substance. What we describe as birth isno morethan incipient change froma prior state, while dying is merely to quit it. Though the parts may be transported hither and thither, the sum of all matter is constant.

-Ovid full name Publius OvidiusNaso   4317
Metamorphoses, bk.15, l.252^8 (translated by Peter Green).