On the boundless plain careering
By an unseen compass steering, Wildly flying, reappearing, —
With untamed fire their broad eyes glowing
In every step a grand pride showing,
Of no servile moment knowing, — Happy as the trees and flowers, In their instinct cradled hours,
Happier in fuller powers, — See the wild herd nobly ranging,
Nature varying, not changing,
Lawful in their lawless ranging.

Life Without and Life Within (1859) - The Captured Wild Horse