The little ones

"If you examine the powder of rotten wood under the Smicroscopium, an immense pullulation of little worms will be found, of which some are outfitted with little horns, some have wings of a sort, others are not unlike centipedes, and you will see eyes like little black dots along with noses . . . Because they themselves have been placed in the world with bodies so tiny that they are beyond the reach of the senses, how tiny can their little hearts be? How tiny must their little livers be, or their little stomachs, their cartilage and little nerves, their means of locomotion?"

Athanasius Kircher, Scrutinium contagiosae luis, quae pestis dicitur (Rome, 1658)