Dark Shark in Shallow Water

Every human brain's an island,
Volcanic, steaming and fuming
At birth, out of the salt ocean,

Startlingly active in bare air,
More alive than ever again,
But not at all, as it will be,

Alive with what the wind blows in.

How big it will, shrinking, become
With lives, a world "all folded up . . .

And so secret." Complexities
To astonish, weather, and hide
Even its own convolutions

In a welter never the same,
Nor the same in any brain else,
But borrowed before it evolves.