Three Songs from Shakespeare: Musick to hear

Music to hear, why hear'st thou music sadly?
Sweets with sweets war not, joy delights in joy
Why lov'st thou that which thou receiv'st not gladly?
Or else receiv'st with pleasure, with pleasure thine annoy?
If the true concord of well-tuned sounds
By unions married do offend thine ear
They do but sweetly chide thee, who confounds
In singleness the part that thou shouldst bear
Mark, how one string, sweet husband to another
Strikes each in each by mutual warding
Resembling seal and child and happy mother
Who, one in one, one pleasing note do sing
Who, speechless song, meaning many, seeming one
Sings this to thee, thou single will to none