The planetary joys: why the houses mean what they mean

Here is a question beginners ask and rarely get a straight answer to: why does the sixth house mean illness?

It is an odd thing for a slice of sky to mean. Nobody chose it arbitrarily, and it is not obvious from anything else about the sixth. The Hellenistic answer is unexpectedly satisfying: because the sixth house is where Mars rejoices.

The scheme

Each of the seven traditional planets has one house that is its joy — a place where it is at home in a way that has nothing to do with signs or rulership:

Read the two columns together and the house meanings stop looking arbitrary. Venus rejoices in the fifth, and the fifth is about pleasure and love. Saturn rejoices in the twelfth, and the twelfth is about isolation and constraint. Jupiter in the eleventh, and the eleventh is about your friends and benefactors.

The old Greek names for the fifth, sixth, eleventh and twelfth were literally Good Fortune, Bad Fortune, Good Spirit and Bad Spirit — and the pattern of which planet joys where is exactly the pattern of which of those is good and which is bad.

The bit that makes it click

The joys are not a random list. Look at where they sit.

The three day-sect planets — Sun, Jupiter, Saturn — all rejoice in the upper half of the chart, above the horizon, where the daylight is. The three night-sect planets — Moon, Venus, Mars — all rejoice in the lower half, below the horizon.

And Mercury, which belongs to whichever sect its position relative to the Sun puts it in, rejoices in the first house: the only joy sitting on the horizon itself, on the line between the two.

Once you see that, the scheme stops being seven facts and becomes one idea. (If sect is new to you, the lesson on day and night charts covers it.)

What to do with it

Three practical uses, in ascending order of usefulness.

A planet in its joy is strengthened. Not in the way domicile or exaltation strengthens it — this is a different axis, and it is quieter. But Saturn in the twelfth is doing something it understands, however grim the twelfth sounds. Mars in the sixth is unpleasant but competent.

It explains house meanings you had to memorise. This is the real value for most people. The sixth house's association with illness and hard labour is a consequence of Mars living there, not a separate fact.

It marks where a difficult planet is least out of place. A malefic in its joy is still a malefic. But the tradition treated it as being in the one room of the house it knows its way around.

An honest caveat

The joys are well attested — they are in the Hellenistic sources, and the house names line up with them too neatly to be coincidence. What is not settled is why each planet was assigned where.

There are theories. Some involve the symmetry above and below the horizon; some involve Pythagorean number ideas; some argue the causation runs the other way, and the planets were assigned to houses whose meanings were already established. Ancient authors report the scheme more often than they justify it.

So treat the joys as a real and old part of the tradition, and treat any tidy story about their origin — including the neat sect symmetry above — as a good pattern rather than a proven derivation.

One last thought

What I like here is that it is one of the few places where astrology shows its own workings. Most of the time you are handed a meaning and asked to take it on trust. The joys let you watch a meaning being built — Mars goes here, and centuries later "here" means the thing Mars does.

Whether you find that reassuring or unsettling probably says something about how you like your traditions. I find it reassuring. A system that can explain where its own furniture came from is a system you can argue with, and that is worth more than one that cannot.