Jessica:
I am never merry when I hear sweet music.

Lorenzo:
The reason is, your spirits are attentive:
The man that hath no music in himself,
Nor is not mov'd with concord of sweet sounds,
Is fit for treasons, stratagems and spoils;
The motions of his spirit are dull as night,
And his affections dark as Erebus:
Let no such man be trusted... Music! hark!