"The first fundamental rule of historical science and research, when by these is sought a knowledge of the general destinies of mankind, is to keep these, and every object connected with them, steadily in view, without losing ourselves in the details of special inquiries and particular facts, for the multitude and variety of these subjects is absolutely boundless; and on the ocean of historical science the main subject easily vanishes from the eye. ...In the higher grades of academic instruction, the lessons on history must vary with each one's calling and pursuits ...[T]he archives of many a state would alone furnish occupation for more than a man's life. ...The first fundamental rule ...to keep the attention fixed on the main subject, and not to let it be distracted or dissipated by a number of minute details—concerned more the method of historical science. The second rule regards the subject and purport of history... [W]e should not wish to explain every thing. Historical tradition must never be abandoned in the —otherwise we lose all firm ground and footing... [W]e have nothing to do but to record, as it is given, the best and safest testimony which tradition, so far as we have it, can afford... Extremely hazardous is the desire to explain every thing, and to supply whatever appears a gap in history—for in this propensity lies the first cause and germ of all those violent and arbitrary hypotheses which perplex and pervert the science of history far more than the open avowal of our ignorance, or the uncertainty of our knowledge: hypotheses which give an oblique direction, or an exaggerated and false extension to a view of the subject originally not incorrect. And even if there are points which appear not very clear to us, or which we leave unexplained—this will not prevent us from comprehending, so far... as the limited conception of man is able, the great outline of human history, though here and there a gap should remain."