We foresee no limit to scientific advancement in the future, and in scientific truth there is nothing dead; science is always a living and growing body of knowledge; but art on the contrary has many times run its course to an end, and exhausted its vital power.

What faith in man must in our new world beat, Thinking how once he saw before his face The west and all the host of stars retreat Into the silent infinite of space!

Agitation is that part of our intellectual life where vitality results; there ideas are born, breed and bring forth.

Seasonal changes, as it were, take place in history, when there is practically an almost universal death, a falling of the foliage of the tree of life. Such were the intervals between the ancient and mediaeval time, the mediaeval and the modern.

Art does not, like science, set forth a permanent order of nature, the enduring skeleton of law. Two factors primarily determine its works: one is the idea in the mind of the artist, the other is his power of expression; and both these factors are extremely variable.

The world is a multiplicity, a harvest-field, a battle-ground; and thence arises through human contact ways of numbering, or mathematics, ways of tillage, or agriculture, ways of fighting, or military tactics and strategy, and these are incorporated in individuals as habits of life.

The growth of art seems to be in cycles, and often its vigorous lifetime is restricted to a century or two. The periods of distinctive drama, Greek, English, Spanish, fall within such a limit; the schools of painting and sculpture likewise; and, in poetry, the Victorian age or the school of Pope will serve as examples.