The effect of any writing on the public mind is mathematically measurable by its depth of thought. How much water does it draw? If it awaken you to think, if it lift you from your feet with the great voice of eloquence. then the effect is to be wide. slow. permanent, over the minds of men; if the pages instruct you not. they will die like flies in the hour. The way to speak and write what shall not go out of fashion is. to speak and write sincerely. The argument which has not power to reach my own practice, I may well doubt, will fail to reach yours. But take Sidney's maxim: --'Look in thy heart, and write.' He that writes to himself writes to an eternal public. That statement only is fit to be made public, which you have come at in attempting to satisfy your own curiosity. The writer who takes his subject from his ear, and not from his heart, should know that he has lost as much as he seems to have gained, and when the empty book has gathered all its praise, and half the people say, 'What poetry! What genius!' it still needs fuel to make fire. That only profits which is profitable, Life alone can impart life; and though we should burst, we can only be valued as we make ourselves valuable.