Sonnet XL: Love's Loadstone

I know not if it be the longed-for light
Of her first Maker which the spirit feels;
Or if a time-old memory reveals
Some other beauty for the heart's delight;
Or fame or dreams beget that vision bright,
Sweet to the eyes, which through the bosom steals,
Leaving I know not what that wounds and heals,
And now perchance hath made me weep outright.
Be this what this may be, 'tis this I seek:
Nor guide have I; nor know I where to find
That burning fire; yet some one seems to lead.
This, since I saw thee, lady, makes me weak;
A bitter-sweet sways here and there my mind,
And sure I am thine eyes this mischief breed.