To use a reference book well, you must, first, have some idea, however vague it may be, of what you want to know. Your ignorance must be like a circle of darkness surrounded by light. You want to bring light to the dark circle. You cannot do that unless light surrounds the darkness. Another way to say this is that you must be able to ask a reference book an intelligible question. It will be no help to you if you are wandering, lost, in a fog of ignorance.
Aka, varför jag inte förstår wikipedia ang kemi etc
