And now, because something Mike D said reminded me of it:

Song Of Myself
By Walt Whitman

The past and present wilt--I have fill'd them, emptied them,
And proceed to fill my next fold of the future.

Listener up there! what have you to confide to me?
Look in my face while I snuff the sidle of evening,
(Talk honestly, no one else hears you, and I stay only a minute longer.)

Do I contradict myself?
Very well then I contradict myself,
(I am large, I contain multitudes.)

I concentrate toward them that are nigh, I wait on the door-slab.

Who has done his day's work? who will soonest be through with his supper?

Who wishes to walk with me?
Will you speak before I am gone? will you prove already too late?