You will have heard of the wonderful way in which silk is made -- a way which no one could invent but God -- and how it comes from a kind of seed which looks like tiny peppercorns129 (I have never seen this, but only heard of it, so if it is incorrect in any way the Fault is not mine). When the warm weather comes, and the mulberry-trees begin to show leaf, this seed starts to take life; until it has this sustenance, on which it feeds, it is as dead. The silkworms feed on the mulberry-leaves until they are full-grown, when people put down twigs, upon which, with their tiny mouths, they start spinning silk, making themselves very tight little cocoons, in which they bury themselves. Then, finally, the worm, which was large and ugly, comes right out of the cocoon a beautiful white butterfly.
129 "Mustard-seeds," writes Gracián, interlineally, deleting the bracketed sentence which follows and adding the words: "It is so, for I have seen it."