《管子·山至数》
圣人总是统一用号令的缓急来掌握它，统一用政策的开闭来控制它，用轻重理财之术来夺取它，用仁义之道来支配它。所以，能够与天地共同长久不败，这正是一统天下君主的大权。 桓公问管仲说； 请问关于货币的计算筹划。 
圣人理之以徐疾，守之以决塞，夺之以轻重，行之以仁义，故与天壤同数，此王者之大辔也。 桓公问管子曰： 请问币乘马。 
The sage always unifies the urgency of the order to control it, unifies the opening and closing of the policy to control it, uses the financial skills of the light and heavy to seize it, and uses the way of benevolence and righteousness to control it. Therefore, he can live with the heaven and earth forever, which is the great power of the monarch of the whole world. Duke Huan asks Guan Zhong: Please ask about the calculation and planning of the currency.