To-

Keats once saw a young lady for a few minutes and was so captivated by her that he even felt heartbroken.

To -

TIME’S sea hath been five years at its slow ebb,
  Long hours have to and fro let creep the sand,
Since I was tangled in thy beauty’s web,
  And snared by the ungloving of thine hand.

And yet I never look on midnight sky,
  But I behold thine eyes’ well memoried light;
I cannot look upon the rose’s dye,
  But to thy cheek my soul doth take its flight.

I cannot look on any budding flower,
  But my fond ear, in fancy at thy lips
And harkening for a love-sound, doth devour
  Its sweets in the wrong sense:—Thou dost eclipse

Every delight with sweet remembering,
And grief unto my darling joys dost bring.

Note

Later, it was discovered that the last two lines of this poem To - ["Time's sea"]

Every delight with sweet remembering,
And grief unto my darling joys dost bring.

bear some rhythmic resemblance to these lines from Shakespeare’s sonnet CXIII:

Even so, being full of your ne'er cloying sweetness,
To bitter sauces did I frame my feeding.

No wonder a footnote to Keats’ poem once mentioned, “In the rhythmic handling of emotional structure and the gradually intensifying musicality, it closely resembles Shakespeare’s sonnets.”

/John Keats/