"If a man were living in isolation his income would be literally his product. Make him the monarch and owner of an island, and the fruits that he raises and the clothing that he makes constitute, in themselves, his income. This ceases to be true when trading begins"
"Great talents are the most lovely and often the most dangerous fruits on the tree of humanity. They hang upon the most slender twigs that are easily snapped off"
"Labor is prior to, and independent of, capital. Capital is only the fruit of labor, and could never have existed if labor had not first existed. Labor is the superior of capital, and deserves much the higher consideration"