Read it through once

Then fancies grew rife Which had come long ago on the pasture, when round me the sheep Fed in silence--above, the one eagle wheeled slow as in sleep; And I lay in my hollow and mused on the world that might lie ‘Neath his ken, though I saw but the strip ‘twixt the hill and the sky. {140} And I laughed--“Since my days are ordained to be passed with my flocks, Let me people at least, with my fancies, the plains and the rocks, Dream the life I am never to mix with, and image the show Of mankind as they live in those fashions I hardly shall know! Schemes of life, its best rules and right uses, the courage that gains, And the prudence that keeps what men strive for.” And now these old trains Of vague thought came again; I grew surer; so, once more the string Of my harp made response to my spirit, as thus--