The Empiricists: John Locke: An essay concerning human understanding, abridged by Richard Taylor. George Berkeley: A treatise concerning the principles of human knowledge. Three dialogues between Hylas and Philonous, in opposition to sceptics and atheists

Laugh and cry. Having a good sob is reputed to be good for you. So is laughter, which has been shown to help heal bodies, as well as broken hearts. Studies in Japan indicate that laughter boosts the immune system and helps the body shake off allergic reactions.