Pinch of Salt by Robert Graves

When a dream is born in you
With a sudden clamorous pain,
When you know the dream is true
And lovely, with no flaw nor strain,
O then, be careful, or with sudden clutch
You'll hurt the delicate thing you prize so much.

Dreams are like a bird that mocks,
Flirting the feathers of his tail.
When you sieze at the salt box,
Over the hedge you'll see him sail.
Old birds are neither caught with salt nor chaff:
They watch you from the apple bough and laugh.

Poet, never chase the dream.
Laugh yourself and turn away.
Mask your hunger; let it seem
Small matter if he come or stay;
But when he nestles in your hand at last,
Close up your fingers tight and hold him fast.