“It is the things of the spirit, the arts of the country, which have always led mankind forward, and it is to this spirit that the craftsmen of the world must lend themselves.”

Editorial comment identified as from the Brooklyn Daily Eagle (11 May 1846)
Disputed

Emotional Architecture as Compared to Intellectual (1894)
Context: Man, by means of his physical power, his mechanical resources, his mental ingenuity, may set things side by side. A composition, literally so called, will result, but not a great art work, not at all an art work in fact, but merely a more or less refined exhibition of brute force exercised upon helpful materials. It may be as a noise in lessening degrees of offensiveness, it can never become a musical tone. Though it shall have ceased to be vulgar in becoming sophistical, it will remain to the end what it was in the beginning: impotent to inspire — dead, absolutely dead.
It cannot for a moment be doubted that an art work to be alive, to awaken us to its life, to inspire us sooner or later with its purpose, must indeed be animate with a soul, must have been breathed upon by the spirit and must breathe in turn that spirit. It must stand for the actual, vital first-hand experiences of the one who made it, and must represent his deep-down impression not only of physical nature but more especially and necessarily his understanding of the out-working of that Great Spirit which makes nature so intelligible to us that it ceases to be a phantasm and becomes a sweet, a superb, a convincing Reality.

2013, Cape Town University Address (June 2013)
Context: We always have the opportunity to choose our better history. We can always understand that most important decision -- the decision we make when we find our common humanity in one another. That’s always available to us, that choice. [... ] it can be heard in the confident voices of young people like you. It is that spirit, that innate longing for justice and equality, for freedom and solidarity -- that’s the spirit that can light the way forward. It's in you.

The Monetary Conference of the American Republics (1891)
Context: It is not the form of things that must be attended to but their spirit. The real is what matters, not the apparent. In politics, reality is that which is unseen. Politics is the art of combining a nation’s diverse or opposing factors to the benefit of its domestic well-being, and of saving the country from the open enmity or covetous friendship of other nations.

The Ages http://www.gutenberg.org/files/16341/16341-h/16341-h.htm#page1, st. XXXIII (1821)

The Crisis No. V (1778)
1770s, The American Crisis (1776–1783)

Source: The Bell Jar (1963), Ch. 11

Manifesto (1919)