Now to Some it appears not at all worth while to follow out the endless divisions of Nature; and moreover a dangerous undertaking, without fruit and issue. As we can never reach, say they, the absolutely smallest grain of material bodies, never find their simplest compartments, since all magnitude loses itself, forwards and backwards, in infinitude; so likewise is it with the species of bodies and powers; here too one comes on new species, new combinations, new appearances, even to infinitude. These seem only to stop, continue they, when our diligence tires; and so it is spending precious time with idle contemplations and tedious enumerations; and this becomes at last a true delirium, a real vertigo over the horrid Deep

Pupils at Sais (1799)