What I must do is all that concerns me, not what people think. This rule,equally arduous in actual and intellectual life, may serve for the whole distinction between greatness and meanness. It is the harder, because you will always find those who think they know what is your duty better than you know it. It is easy in the world to live after the world's opinion; it is easy in solitude to live after our own; but the great man is he who in the midst of the crowd keeps with perfect sweetness the independence of solitude.

Most of the classical citations you shall hear or read in the current journals or speeches were not drawn from the originals, but from previous quotations in English books.

Go forth into the busy world and love it. Interest yourself in its life, mingle kindly with its joys and sorrows.

Nature is a rag-merchant, who works up every shred and ort and end into new creations; like a good chemist, whom I found, the other day, in his laboratory, converting his old shirts into pure white sugar.

Broader and deeper we must write our annals, from an ethical reformation, from an influx of the ever new, ever sanative conscience, if we would trulier express our central and wide-related nature, instead of this old chronology of selfishness and pride to which we have too long lent our eyes. Already that day exists for us, shines in on us at unawares, but the path of science and of letters is not the way into nature. The idiot, the Indian, the child, and unschooled farmer's boy, stand nearer to the light by which nature is to be read, than the dissector or the antiquary.

Health is the first muse, and sleep is the condition to produce it.

Moller, in his Essay on Architecture, taught that the building which was fitted accurately to answer its end would turn out to be beautiful, though beauty had not been intended. I find the like unity in human structures rather virulent and pervasive.