On 30 September Mercury enters Scorpio. What changes is how you think and speak: for a few weeks your mind stops settling for what is visible and starts digging under the surface.

What is happening

Scorpio is fixed Water, the eighth sign, the one of death, sex and whatever stays hidden: still, deep water that ferments and transforms whatever falls into it. With Mercury here, thought stops circling and goes straight for what other people would rather not say. Mercury is exalted in this sign: your mind investigates better than usual, reads hidden motives, and sniffs out half-truths.

Mars is at home in the same sign, with a strong Plutonian imprint: thinking carries an almost aggressive charge, able to go deep without flinching at discomfort. Venus is in detriment and Jupiter in fall: these days you lack the lightness to let things go, and every conversation risks carrying more weight than it needed to.

How to use it

Use this stretch for conversations that need truth, not politeness: clearing up a doubt you have been sitting on for a while, bringing up a topic you usually avoid, understanding what is actually behind someone's behaviour. Mercury in Scorpio gives you the sharpness to go deep, more than you would in a lighter moment.

Where it pays to watch out is suspicion that feeds itself. These days the mind digs even where there is nothing to find, and the temptation is to read a hidden motive into everything. Before you treat a dark interpretation as certain, ask yourself whether you have proof or just a hunch: those are two different things, and only the first one deserves to be said out loud.

Where you feel it most

If your Sun, Moon, Ascendant or Mercury is in Scorpio, or in one of the other Water signs (Cancer, Pisces), you feel this transit directly: sharper than usual in how you think, and more prone to suspicion when something does not add up. For everyone else, what matters is the house of your birth chart this Mercury falls in: that is where you look for the truth under the surface over these weeks.

Want to know which house it falls in and what that means for you specifically? Calculate your birth chart: all it takes is your date, time and place of birth.