The vessel, though her masts be firm, Beneath her copper bears a worm. - Henry David Thoreau

It is to be remembered that by good deeds or words you encourage yourself, who always have need to witness or hear them.

It is surprising with what impunity and comfort one who has always lain in a warm bed in a close apartment, and studiously avoided drafts of air, can lie down on the ground without a shelter, roll himself in a blanket, and sleep before a fire, in a frosty, autumn night, just after a long rain-storm, and even come soon to enjoy and value the fresh air.

... Nature, who is superior to all styles and ages, is now, with pensive face, composing her poem Autumn, with which no work of man will bear to be compared.