Plotinos: Complete Works, v. 2 In Chronological Order,...

41. Neither the sun, nor any other star hears the prayers addressed to it. If they are granted, it is only by the sympathy felt by each part of the universe for every other; just as all parts of a cord are caused to vibrate by excitation of any one part; or, just as causing one string of a lyre to vibrate would cause all the others to vibrate in unison, because they all belong to the same system of harmony. If sympathy can go as far as making one lyre respond to the harmonies of another, so much the more must this sympathy be the law of the universe, where reigns one single harmony, although its register contains contraries, as well as similar and analogous parts. The things which harm men, like anger, which, together with the bile, relate to the liver, were not created for the purpose of harming men. It is as if a person, in the act of taking fire from a hearth accidentally wounded another. This person is doubtless the author of the wound because he transferred the fire from one place to another; but the wound occurred only because the fire could not be contained by the being to whom it had been transmitted.