change is an evil. The conditions of life are so simple and so unvarying that any decent sort of rules suffice so long as men know what they are. Custom is the first check on tyranny; that fixed routine of social life at which modern innovations chafe, and by which modern improvement is impeded, is the primitive check on base power. The perception of political expediency has then hardly begun; the sense of abstract justice is weak and vague; and a rigid adherence to the fixed mould of transmitted usage is essential to an unmarred, unspoiled, unbroken life.