“The material object of observation, the bicycle or rotisserie, can’t be right or wrong. Molecules are molecules. They don’t have any ethical codes to follow except those people give them. The test of the machine is the satisfaction it gives you. There isn’t any other test. If the machine produces tranquillity it’s right. If it disturbs you it’s wrong until either the machine or your mind is changed. The test of the machine’s always your own mind. There isn’t any other test.”