DEAR HARRY: My father showed me an article about John Bogle (he's the guy who founded Vanguard Funds) in which Bogle once again promoted index funds. I have been an investor in no-load funds ever since I heard your favorable opinion at least 10 years ago. But I have never really understood why going for the "average" of a group (as you do in index funds) is better than going for a policy of beating the average. Don't we all hope that we can do better than the market average? Should I go for Bogle's advice, or should I look for the funds or individual stocks that have a good history and good prospects?