《Tetrabiblos》That Prescience Is UsefulClaudius Ptolemy（Ashmand 英譯 1822）
[25] In allusion to the sympathetic powers anciently attributed to certain stones. In exercising prognostication, therefore, strict care must be taken to foretell future events by that natural process only which is admitted in the doctrine here delivered; and, setting aside all vain and unfounded opinions, to predict that, when the existing agency is manifold and great, and of a power impossible to be resisted, the corresponding event which it indicates shall absolutely take place; and also, in other cases, that another event shall not happen when its exciting causes are counteracted by some interposing influence.
段落 tetra-1-thatpresci-17public-domain (Ashmand 1822)
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