It is often said that ‘experience is the best teacher.’ And in many cases this may be true. Yet at the same time it is frequently pointed out that if we can ‘watch and learn’ from someone, or be coached by him, all the better. For though we can readily learn things in ‘the school of hard knocks,’ it is often easier for us to learn how to do something, or learn how to apply some particular knowledge to a situation, when we can actually watch someone else do it first and so observe what he does.