Sonnet 14: Not from the stars do I my judgement pluck

Not from the stars do I my judgement pluck,
And yet methinks I have astronomy—
But not to tell of good or evil luck,
Of plagues, of dearths, or seasons' quality;
Nor can I fortune to brief minutes tell,
'Pointing to each his thunder, rain, and wind,
Or say with princes if it shall go well
By oft predict that I in heaven find.
But from thine eyes my knowledge I derive,
And, constant stars, in them I read such art
As truth and beauty shall together thrive
If from thy self to store thou wouldst convert;
    Or else of thee this I prognosticate:
    Thy end is truth's and beauty's doom and date.