Value is the life-giving power of anything; cost, the quantity of labour required to produce it; its price, the quantity of labourwhich its possessor will take in exchange for it.
John RuskinNo one can explain how the notes of a Mozart melody, or the folds of a piece of Titian's drapery, produce their essential effects. If you do not feel it, no one can by reasoning make you feel it.
John Ruskin