《Tetrabiblos》Friends And EnemiesClaudius Ptolemy（Ashmand 英譯 1822）
With respect to friendship and enmity, it may be observed that great and lasting familiarities, or disagreements, are respectively called sympathies and enmities; while the smaller, such as arise occasionally, and subsist for a short time only, are denominated casual intimacies and strifes: the whole are to be contemplated according to the following rules.
段落 tetra-4-friendsand-1public-domain (Ashmand 1822)
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