Almagest

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Mercury trine Saturn

Mercury trine Saturn, within one nativity or between two charts in synastry

What the tradition reads

Within a single chart Mercury trine Saturn is read, like the sextile, as a mind well disciplined when it needs to be, with strong powers of organization and orderliness. The tradition names the trine the more dynamic of the two harmonious Mercury-Saturn contacts, this same discipline arriving as a steady, unforced undertone to how the person thinks rather than a resource the sextile's native has to actively call upon. Between two charts, one person's Mercury trine another's Saturn is read as a partner who helps structure thoughts and give form to ideas with the least friction of any Mercury-Saturn contact, the Saturn person listening well, guiding and disciplining in mostly pleasing ways, offering practical advice that the Mercury person can put to genuine use.

The story

A trine is a hundred and twenty degrees, a third of the circle; Ptolemy's chapter on the mutual configuration of the signs calls it, together with the sextile, harmonious, since the signs it joins are of the same kind, all masculine or all feminine, and Wikipedia's own summary of the aspect calls the trine extremely beneficial, indicating harmony, ease and what is natural, one of the two aspects the tradition sets against the square and opposition's discord. Mercury's own father, Jupiter, succeeded his father, Saturn, as king of the gods, a succession the Romans kept free of violence, Saturn rewarded afterward with his own temple and a continuing cult rather than exile; Mercury, born into the household that replaced Saturn's own reign, carries a share of that history simply by being Jupiter's son, without either generation's story cancelling the other out. At the trine's easy angle, the herald and the old king agree without a fight, quickness and structure moving together the way habits pass down to a grandson raised inside the same household.

Written from

Corpus key aspect:Mercury:Saturn:trine.