In general, the word "fair" can refer to physical attractiveness, beauty, or qualities considered pleasing or admirable. In Shakespeare's plays, the word "fair" is frequently used to describe beautiful women or attractive individuals. The word "owest" is an old form of the verb "owe," which means to have an obligation or debt to someone.
Here are a few possible interpretations of the phrase "fair thou owest":
1. Acknowledging Beauty: The phrase may be used as an expression of appreciation or admiration for someone's beauty. It suggests that the person's beauty is worthy of recognition and gratitude, implying that they have a debt of appreciation owed to them for possessing such beauty.
2. Moral Obligation: It could be interpreted as a reminder that beauty comes with certain moral obligations. The person who is acknowledged as "fair" may have a responsibility to use their beauty for noble purposes or for the benefit of others, rather than simply for their own personal gain or vanity.
3. Recognition and Celebration: The phrase may simply aim to celebrate the existence of beauty or virtue. It highlights the importance of recognizing and appreciating the good and beautiful aspects of life, and acknowledges the contribution of those who possess such qualities.
It is important to note that, since the exact context in which the phrase "fair thou owest" was used by Shakespeare is unknown, its meaning may vary depending on the play or situation in which it was employed.