"Of making books there is no end," complained the Preacher; and did not perceive how highly he was praising letters as an occupation. There is no end, indeed, to making books or experiments, or to travel, or to gathering wealth. Problem gives rise to problem. We may study for ever, and we are never as learned as we would. We have never made a statue worthy of our dreams. And when we have discovered a continent, or crossed a chain of mountains, it is only to find another ocean or another plain upon the further side. In the infinite universe there is room for our swiftest diligence and to spare. It is not like the works of Carlyle, which can be read to an end. Even in a corner of it, in a private park, or in the neighbourhood of a single hamlet, the weather and the seasons keep so deftly changing that although we walk there for a lifetime there will be always something new to startle and delight us.