explain this to me.

Soc. These to be sure. I will teach you it by powerful
evidence. Come, where have you ever seen him raining at
any time without Clouds? And yet he ought to rain in
fine weather, and these be absent.

Strep. By Apollo, of a truth you have rightly confirmed
this by your present argument. And yet, before this, I
really thought that Jupiter caused the rain. But tell me
who is it that thunders. This makes me tremble.

Soc. These, as they roll, thunder.

Strep. In what way? you all-daring man!

Soc. When they are full of much water, and are compelled
to be borne along, being necessarily precipitated when
full of rain, then they fall heavily upon each other and
burst and clap.

Strep. Who is it that compels them to borne along? Is it
not Jupiter?

Soc. By no means, but aethereal Vortex.

Strep. Vortex? It had escaped my notice that Jupiter did
not exist, and that Vortex now reigned in his stead. But
you have taught me nothing as yet concerning the clap
and the thunder.