Man's life's a vapor, and full of woes; he cuts a caper, and down he goes

That vapor is very hot and expands outward from the point of impact, cooling and expanding as it goes. As it cools the vapor condenses as little droplets and rains out over the whole Earth.

What goes around, comes around

What goes down usually comes up

To the victor goes the spoils

The shoemaker's son always goes barefoot