George Henry Lewes

"Every one who has seriously investigated a novel question, who has really interrogated Nature with a view to a distinct answer, will bear me out in saying that it requires intense and sustained effort of imagination. The relations of sequence among the phenomena must be seen; they are hidden; they can only be seen mentally; a thousand suggestions rise before the mind, but they are recognised as old suggestions, or as inadequate to reveal what is sought; the experiments by which the problem may be solved have to be imagined; and to imagine a good experiment is as difficult as to invent a good fable, for we must have distinctly present — clear mental vision — the known qualities and relations of all the objects, and must see what will be the effect of introducing some new qualifying agent. If any one thinks this is easy, let him try it: the trial will teach him a lesson respecting the methods of intellectual activity not without its use."

"In Science the paramount appeal is to the Intellect — its purpose being instruction; in Art, the paramount appeal is to the Emotions — its purpose being pleasure. A work of Art must of course indirectly appeal to the Intellect, and a work of Science will also indirectly appeal to the Feelings; nevertheless a poem on the stars and a treatise on astronomy have distinct aims and distinct methods. But having recognised the broadly-marked differences, we are called upon to ascertain the underlying resemblances. Logic and Imagination belong equally to both. It is only because men have been attracted by the differences that they have overlooked the not less important affinities."

"If clear Vision be indispensable to success in Art, all means of securing that clearness should be sought. Now one means is that of detaining an image long enough before the mind to allow of its being seen in all its characteristics. The explanation Newton gave of his discovery of the great law, points in this direction; it was by always thinking of the subject, by keeping it constantly before his mind, that he finally saw the truth. Artists brood over the chaos of their suggestions, and thus shape them into creations."

"I wish to guard the Principle of Vision from certain misconceptions which might arise on a simple statement of it. The principle insists on the artist assuring himself that he distinctly sees what he attempts to represent. What he sees, and how he represents it, depend on other principles. To make even this principle of Vision thoroughly intelligible in its application to all forms of Literature and Art, it must be considered in connection with the two other principles — Sincerity and Beauty, which are involved in all successful works."

"It is always understood as an expression of condemnation when anything in Literature or Art is said to be done for effect; and yet to produce an effect is the aim and end of both."

"In the development of the great series of animal organisms, the Nervous System assumes more and more of an imperial character. The rank held by any animal is determined by this character, and not at all by its bulk, its strength, or even its utility. In like manner, in the development of the social organism, as the life of nations becomes more complex, Thought assumes a more imperial character; and Literature, in its widest sense, becomes a delicate index of social evolution. Barbarous societies show only the germs of literary life. But advancing civilisation, bringing with it increased conquest over material agencies, disengages the mind from the pressure of immediate wants, and the loosened energy finds in leisure both the demand and the means of a new activity: the demand, because long unoccupied hours have to be rescued from the weariness of inaction; the means, because this call upon the energies nourishes a greater ambition and furnishes a wider arena."