——‘The sounding cataract Haunted me like a passion: the tall rock, The mountain, and the deep and gloomy wood, Their colours and their forms were then to me An appetite, a feeling, and a love, That had no need of a remoter charm By thought supplied, or any interest Unborrowed from the eye.’ So the forms of nature, or the human form divine, stood before the great artists of old, nor required any other stimulus to lead the eye to survey, or the hand to embody them, than the pleasure derived from the inspiration of the subject, and ‘propulsive force’ of the mimic creation. The grandeur of their works was an argument with them, not to stop short, but to proceed. They could have no higher excitement or satisfaction than in the exercise of their art and endless generation of truth and beauty. Success prompts to exertion; and habit facilitates success. It is idle to suppose we can exhaust nature; and the more we employ our own faculties, the more we strengthen them and enrich our stores of observation and invention. The more we do, the more we _can_ do. Not indeed if we _get our ideas out of our own heads_—that stock is soon exhausted, and we recur to tiresome, vapid imitations of ourselves. But this is the difference between real and mock talent, between genius and affectation. Nature is not limited, nor does it become effete, like our conceit and vanity. The closer we examine it, the more it refines upon us; it expands as we enlarge and shift our view; it ‘grows with our growth, and strengthens with our strength.’ The subjects are endless; and our capacity is invigorated as it is called out by occasion and necessity. He who does nothing, renders himself incapable of doing any thing; but while we are executing any work, we are preparing and qualifying ourselves to undertake another. The principles are the same in all nature; and we understand them better, as we verify them by experience and practice. It is not as if there was a given number of subjects to work upon, or a set of _innate_ or preconceived ideas in our minds which we encroached upon with every new design; the subjects, as I said before, are endless, and we acquire ideas by imparting them. Our expenditure of intellectual wealth makes us rich: we can only be liberal as we have previously accumulated the means. By lying idle, as by standing still, we are confined to the same trite, narrow round of topics: by continuing our efforts, as by moving forwards in a road, we extend our views, and discover continually new tracts of country. Genius, like humanity, rusts for want of use.