One main genesis-motive of the Leaves was my conviction (just as strong today as ever) that the crowning growth of the United States is to be spiritual and heroic. To help start and favor that growth⁠—or even to call attention to it, or the need of it⁠—is the beginning, middle, and final purpose of the poems. (In fact, when really cipher’d out and summ’d to the last, plowing up in earnest the interminable average fallows of humanity⁠—not “good government” merely, in the common sense⁠—is the justification and main purpose of these United States.)

Isolated advantages in any rank or grace or fortune⁠—the direct or indirect threads of all the poetry of the past⁠—are in my opinion distasteful to the republican genius, and offer no foundation for its fitting verse. Establish’d poems, I know, have the very great advantage of chanting the already perform’d, so full of glories, reminiscences dear to the minds of men. But my volume is a candidate for the future. “All original art,” says Taine, anyhow, “is self-regulated, and no original art can be regulated from without; it carries its own counterpoise, and does not receive it from elsewhere⁠—lives on its own blood”⁠—a solace to my frequent bruises and sulky vanity.