Academic chairs are many, but wise and noble teachers are few; lecture-rooms are numerous and large, but the number of young people who genuinely thirst after truth and justice is small. Nature scatters her common wares with a lavish hand, but the choice sort she produces but seldom. We all know that, so why complain? Was it not ever thus and will it not ever thus remain? Certainly, and one must take what Nature gives as one finds it.