/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: riafe12 https://cdn.slidesharecdn.com/profile-photo-riafe12-48x48.jpg?cb=1523556071 "Everyone talks about rock these days; the problem is they forget about the roll". ���It is surely a matter of common observation that a man who knows no one thing intimately has no views worth hearing on things in general. The farmer philosophizes in terms of crops, soils, markets, and implements, the mechanic generalizes his experiences of wood and iron, the seaman reaches similar conclusions by his own special road; and if the scholar keeps pace with these it must be by an equally virile productivity.���