So nicely poised, that if one atom flings
Its weight away, aloft the planet springs,
And wings its course through realms of boundless space
Outstripping comets in eccentric race.
Add but one atom more, it sinks outright
Down to the realms of Tartarus and night.
What waters melt or scorching fires consume,
In different forms their being re-assume:
Hence can no change arise, except in name,