perfect sentences

I sometimes think about the perfect sentence. It mustn't be too long and typically it must express something profound. But what makes it perfect is the matching of the economy of style with the idea, half guessed at, intuited. It must sound right, the timing, as in life, being nearly everything. (Any suggestions are more than welcome).

You might well ask: does where the line come in make any difference? Probably not. The line startles with its originality, its pitch perfect sense.

Some candidates:

This lacks brevity but has the momentum and lightness of a forward dream:

'He moved through the fields like a sleepwalker, lost in thought, waving his cane high in the air, following his star, which he would lose amid the sunflowers, only to find it again at the edge of the field—on his greasy black frock coat.'

Or this:

'Whatever remains green is more deeply, richly green than it was before'

Or, more recently, this:

'Clocks struck widely different hours'.

There are philosophical lines-"pleasure is the fundamental awareness of reality" and there are poetic fragments as well. Would chose something from K. Irby or this, from another J. B. 

'The flower's pollen
is older than the mountains.'