Here is the poem [
rpo.library.utoronto.ca]:
Follow thy fair sun, unhappy shadow;
Though thou be black as night,
And she made all of light,
Yet follow thy fair sun, unhappy shadow.
Follow her, whose light thy light depriveth;
Though here thou liv'st disgraced,
And she in heaven is placed,
Yet follow her whose light the world reviveth.
Follow those pure beams, whose beauty burneth;
That so have scorched thee,
As thou still black must be,
Till her kind beams thy black to brightness turneth.
Follow her, while yet her glory shineth;
There comes a luckless night
That will dim all her light;
And this the black unhappy shade divineth.
Follow still, since so thy fates ordained;
The sun must have his shade,
Till both at once do fade,
The sun still proud, the shadow still disdained.
Look up 'extended metaphor' <[
www.poeticbyway.com]>.
Campion is extending the metaphor of the lover being in the shadow of the loved one. Makes no logical sense that I can see, since the loved one would be between the sun and the lover in order to create such a shadow, and the author has the lover
being the sun, but whatcha gonna do. Could be the lover was of a dark-skinned race, you say? Possible, but difficult to prove.