Analysis of Sonnet 47: Betwixt mine eye and heart a league is took

Betwixt mine eye and heart a league is took,
And each doth good turns now unto the other,
When that mine eye is famished for a look,
Or heart in love with sighs himself doth smother,
With my love's picture then my eye doth feast
And to the painted banquet bids my heart;
Another time mine eye is my heart's guest,
And in his thoughts of love doth share a part.
So, either by thy picture or my love,
Thyself, away, art present still with me;
For thou not farther than my thoughts canst move,
And I am still with them, and they with thee;
    Or, if they sleep, thy picture in my sight
    Awakes my heart to heart's and eye's delight.