Astronomicon, Book I

Heph. Theb. I 11, Ptol. tetr. p. 10, comm. Ptol. p. 35. Firm. II 23 7 "But those places which are so positioned that their parts, by no duplication, triplication, or quadruplication, complete the whole number of 360 parts, are joined with the horoscope, nor with any other sign, by any method of association. And because of this, whatever sign is found outside this number is called sluggish and sightless." Cens. de die nat. 8 6 and 10, Auson. 369 13 sq. and 24 sq. The denial of sympathy to adjacent signs is criticised by Geminus 2 14, "although it were reasonable that sympathy should arise from the signs situated most closely together," and Paulus E 3 allows certain of the asyndeta [unconnected] to be brought into relationship by what Geminus calls syzygiai, with which we are not here concerned. Censorinus too is willing to concede to neighbouring signs a "weak vision," and Manilius himself in verse 681 says that they preside over the relations of neighbours.

395-432

There remains the aspect of direct opposition, which joins the confronting signs by six lines drawn through the centre of the circle. This aspect is powerful but, Manilius here says, discordant no less often than harmonious; less often harmonious than discordant, he says at verse 652. The opposed signs are these:

A circular diagram of the zodiac titled "DIAMETRA" below. The circle is divided into 12 segments, each containing a zodiac symbol. Six diameter lines intersect at the center, connecting opposite signs. Starting from the top and moving clockwise, the signs are: Cancer (♋︎), Gemini (♊︎), Taurus (♉︎), Aries (♈︎), Pisces (♓︎), Aquarius (♒︎), Capricorn (♑︎) at the bottom, Sagittarius (♐︎), Scorpio (♏︎), Libra (♎︎), Virgo (♍︎), and Leo (♌︎).

Gemin. 2 2 "Opposite signs are those which lie along the same diameter. They are these: Aries-Libra, Taurus-Scorpius, Gemini-Sagittarius, Cancer-Capricornus,"