Rules, no doubt, are necessary in such cases, and coarse and cruel masters will make coarse and cruel rules, which, at the time we treat of at least, they used sometimes to enforce tyrannically; but though I describe imperfect characters (every character in this book will be found to be more or less imperfect, my pen refusing to draw anything in the model line), I have not undertaken to handle degraded or utterly infamous ones. 
Though I describe imperfect characters (every character in this book will be found to be more or less imperfect, my pen refusing to draw anything in the model line), I do not handle utterly degraded ones. 