這句話是出自惠特曼(Walt Whitman, 1819~1892)的草葉集(Leaves of Grass).
原詩全文如下:

O Captain! My Captain!

O Captain! My Captain! our fearful trip is done;
The ship has weather'd every rack, the prize we sought is
won;
The port is near, the bells I hear, the people all exulting,
While follow eyes the steady keel, the vessel grim and
daring:

But O heart! heart! heart!
O the bleeding drops of red,
Where on the deck my Captain lies,
Fallen cold and dead.

O Captain! My Captain! rise up and hear the bells;
Rise up-for you the flag is flung-for you the bugle trills;
For you bouquets and ribbon'd wreaths-for you the shores
a-crowding;
For you they call, the swaying mass, their eager faces
turning:

Here Captain! dear father!
This arm beneath your head;
It is some dream that on the deck,
You've fallen cold and dead.

My Captain does not answer, his lips are pale and still;
My father does not feel my arm, he has no pulse or will;
The ship is anchor'd safe and sound, its voyage closed and
done;
From fearful trip the victor ship comes in with object won:

Exult, O shores, and ring, O bells!
But I with mournful tread,
Walk the deck my Captain lies,
Fallen cold and dead.