I have brought together as many instances as appear necessary to make out the several points which I wished to suggest to your consideration in this discourse, that your own thoughts may lead you further in the use that may be made of the analogy of the arts, and of the restraint which a full understanding of the diversity of many of their principles ought to impose on the employment of that analogy.

The great end of all those arts is, to make an impression on the imagination and the feeling. The imitation of nature frequently does this. Sometimes it fails, and something else succeeds. I think therefore the true test of all the arts is not solely whether the production is a true copy of nature, but whether it answers the end of art, which is to produce a pleasing effect upon the mind.

It remains only to speak a few words of architecture, which does not come under the denomination of an imitative art. It applies itself, like music (and I believe we may add poetry), directly to the imagination, without the intervention of any kind of imitation.

There is in architecture, as in painting, an inferior branch of art, in which the imagination appears to have no concern. It does not, however, acquire the name of a polite and liberal art, from its usefulness, or administering to our wants or necessities, but from some higher principle: we are sure that in the hands of a man of genius it is capable of inspiring sentiment, and of filling the mind with great and sublime ideas.

It may be worth the attention of artists to consider what materials are in their hands, that may contribute to this end; and whether this art has it not in its power to address itself to the imagination with effect, by more ways than are generally employed by architects.

To pass over the effect produced by that general symmetry and proportion, by which the eye is delighted, as the ear is with music, architecture certainly possesses many principles in common with poetry and painting. Among those which may be reckoned as the first is that of affecting the imagination by means of association of ideas. Thus, for instance, as we have naturally a veneration for antiquity, whatever building brings to our remembrance ancient customs and manners, such as the castles of the barons of ancient chivalry, is sure to give this delight. Hence it is that towers and battlements[23] are so often selected by the painter and the poet, to make a part of the composition of their ideal landscape; and it is from hence in a great degree, that in the buildings of Vanbrugh, who was a poet as well as an architect, there is a greater display of imagination than we shall find perhaps in any other, and this is the ground of the effect we feel in many of his works, notwithstanding the faults with which many of them are justly charged. For this purpose, Vanbrugh appears to have had recourse to some of the principles of the Gothic architecture; which, though not so ancient as the Grecian, is more so to our imagination, with which the artist is more concerned than with absolute truth.

The barbaric splendour of those Asiatic buildings, which are now publishing by a member of this Academy,[24] may possibly, in the same manner, furnish an architect, not with models to copy, but with hints of composition and general effect, which would not otherwise have occurred.

It is, I know, a delicate and hazardous thing (and as such I have already pointed it out), to carry the principles of one art to another, or even to reconcile in one object the various modes of the same art, when they proceed on different principles. The sound rules of the Grecian architecture are not to be lightly sacrificed. A deviation from them, or even an addition to them, is like a deviation or addition to, or from, the rules of other arts,—fit only for a great master, who is thoroughly conversant in the nature of man, as well as all combinations in his own art.

It may not be amiss for the architect to take advantage sometimes of that to which I am sure the painter ought always to have his eyes open, I mean the use of accidents; to follow when they lead, and to improve them, rather than always to trust to a regular plan. It often happens that additions have been made to houses, at various times, for use or pleasure. As such buildings depart from regularity, they now and then acquire something of scenery by this accident, which I should think might not unsuccessfully be adopted by an architect, in an original plan, if it does not too much interfere with convenience. Variety and intricacy is a beauty and excellence in every other of the arts which address the imagination; and why not in architecture?

The forms and turnings of the streets of London, and other old towns, are produced by accident, without any original plan or design; but they are not always the less pleasant to the walker or spectator, on that account. On the contrary, if the city had been built on the regular plan of Sir Christopher Wren, the effect might have been, as we know it is in some new parts of the town, rather unpleasing; the uniformity might have produced weariness, and a slight degree of disgust.