The study of economics does not seem to require any specialized gifts of an unusually high order. Is it not...a very easy subject compared with the higher branches of philosophy or pure science? An easy subject,at which very few excel? The paradox finds its explanation,perhaps,in that the master-ecnomist must possess a rare combination of gifts. He must be mathematician,historian,statesman,philosopher-in some degree。He must understand symbols and speak in words. He must contemplate the particular in terms of the general,and touch abstract and concrete in the some flight of thought. He must study the present in the light of the past for the purposes of the future. NO part of man's nature or his institutions must lie entirely outside his regard. He must be purposeful and disinterested in a simulataneous mood;as aloof and incorruptible ans an artist,yet sometimes as near as politician. 参考资料
