50、An individual human existence should be like a river—small at first，narrowly contained within its banks，and rushing passionately past boulders and over waterfalls.Gradually the river grows wider，the banks recede，the waters flow more quietly，and in the end，without any visible break，they become merged in the sea，and painlessly lose their individual being.—(Britain)B.Russell，Memory I mage
知識貝殼