Locke's Primary and Secondary Qualities When reading Lock's Book II "Of Ideas", one comes to a state of boredom, while reading about things that should seem obvious to an adult. These ideas are mainly trying explain to the reader that a person can not think about something without experiencing it with some sort of sensation first. But then, all of the sudden, one does a double take after reading Lock's thoughts about an object's primary and secondary qualities, which he begins to discuss in chapter eight. Locke states that qualities such as ....