"The eye is continually influenced by what it cannot detect; nay, it is not going too far, to say that it is most influenced by what it detects least. Let the painter define, if he can, the variations of lines on which depend the change of expression in the human countenance."

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The soul is no traveller; the wise man stays at home, and when his necessities, his duties, on any occasion call him from his house, or into foreign lands, he is at home still, and shall make men sensible by the expression of his countenance, that he goes the missionary of wisdom and virtue, and visits cities and men like a sovereign, and not like an interloper or a valet.

— Ralph Waldo Emerson