Dream on! Though Heaven may woo our open eyes,
Through their closed lids we look on fairer skies;
Truth is for other worlds, and hope for this;
The cheating future lends the present’s bliss;
Life is a running shade, with fettered hands,
That chases phantoms over shifting sands;
Death a still spectre on a marble seat,
With ever clutching palms and shackled feet;
The airy shapes that mock life’s slender chain,
The flying joys he strives to clasp in vain,
Death only grasps; to live is to pursue, —
Dream on! there’s nothing but illusion true!

Oliver Wendell Holmes, Sr. (1809–1894) American poet, essayist, scholar

Poem (1861), “The Old Player” (closing lines), Songs in Many Keys (1862)
    (Source)