“By the word materialism, the philistine understands gluttony, drunkenness, lust of the eye, lust of the flesh, arrogance, cupidity, avarice, covetousness, profit-hunting, and stock-exchange swindling — in short, all the filthy vices in which he himself indulges in private. By the word idealism he understands the belief in virtue, universal philanthropy, and in a general way a “better world”, of which he boasts before others but in which he himself at the utmost believes only so long as he is having the blues or is going through the bankruptcy consequent upon his customary “materialist” excesses. It is then that he sings his favorite song, What is man? — Half beast, half angel.”
―
Friedrich Engels,
Ludwig Feuerbach and the End of Classical German Philosophy