First published in 1690, John Locke (1632-1704) provides an account of how we acquire everyday, mathematical, natural scientific, religious and ethical knowledge. Rejecting the theory that some knowledge is innate, he argues that it derives from sense perceptions and experience, as analysed and developed by reason. While defending these central claims with vigorous common sense, he offers many incidental reflections on space and time, meaning, free will and personal identity.