I had not minded walls

I had not minded walls
Were Universe one rock,
And far I heard his silver call
The other side the block.

I'd tunnel until my groove
Pushed sudden through to his,
Then my face take recompense—
The looking in his eyes.

But 'tis a single hair,
A filament, a law—
A cobweb wove in adamant,
A battlement of straw—

A limit like the veil
Unto the lady's face,
But every mesh a citadel
And dragons in the crease!