英语翻译As the correct solution of any problem depends primarily

英语翻译
As the correct solution of any problem depends primarily on a true understanding of what the problem really is,and wherein lies its difficulty,we may profitably pause upon the threshold of our subject to consider first,in a more general way,its real nature; the causes which impede sound practice; the conditions on which success or failure depends; the directions in which error is most to be feared.