To a Poet by Carl Sandburg

I can't find this poem anywhere on the Internet.  But I have it in my Peace Journal.  I hope it is really by Carol Sandburg.  Here it is:

To a Poet
You said I would go alone,
I would find my way.
But you were the strongest person I had known.
You were the morning wind,
and you were stone.

You said:  "I know that you will go your way.
Whatever horse you want to ride is yours,
And night is yours, and the evening gleams, and day.
I can tell you nothing you have not known." 

I said: "I go with you; I am your own."

But I went alone.