You are tired (I think) by E.E. Cummings.

Part 2 of 2.

Ah,

come with me!
I’ll blow you that wonderful bubble, the moon,
That floats forever and a day;
I’ll sing you the jacinth song
Of the probable stars;
I will attempt the unstartled steppes of dream,
Until I find the Only Flower,
Which shall keep (I think) your little heart
While the moon comes out of the sea.