Passion is a word with various meanings. It is used in regard to the body, and refers to diseases and wounds, and again, it is used in reference to the soul, and means desire and anger. But to speak broadly and generally, passion is an animal affection which is succeeded by pleasure and pain. For pain succeeds passion, but is not the same thing as passion. For passion is an affection of things without sense, but not so pain. Pain then is not passion, but the sensation of passion: and it must be considerable, that is to say, it must be great enough to come within the scope of sense.