My favorites:
"To Some I Have Talked with by Fire":
but the loud beat/
Of their long wings, the flash of their white feet.
"The Song of Wandering Aengus":
And walk among the dappled grass
And pluck till time and times are one
The silver apples of the moon,
The golden apples of the sun.
"Mongan Laments that Change That Has Come upon Him and His Beloved":
Do you not hear me calling, white deer with no horns?
I have been changed to a hound with one red ear.
"The Arrow"
There's no man may look upon her, no man,
As when newly grown to be a woman,
Blossom pale, she pulled down the pale blossom
At the moth hour and hid it in her bosom.
"The Young Man's Song"
Ah penny, brown penny, brown penny,
I am looped in the loops of her hair.
"To a Friend Whose Work Has Come to Nothing"
Bred to a harder thing
Than Triumph, turn away
And like a laughing string
Wheron mad fingers play
Amid a place of stone,
Be secret and exult,
Because of all things known
That is most difficult.
All of: "Adam's Curse" and "A Memory of Youth" and "A Coat" and "The Dolls"