QI: Advanced Banter

Why are most books of quotations full of rather pedestrian quotes by people you've never heard of? It's a shame because a really good quotation book, one which gathered the truest and funniest insights of the best minds, and organised them into 250 subjects, from ambition to worry, a book which offered you a useful take on almost every situation life throws at you (from the death of your child's hamster to the unified theory of everything), a sourcebook of wise one-liners, of drole asides and heartfelt statements of truth and beauty, well, that would be worth having.