What's actually happening
Mercury's orbital period is 88 days, but its apparent motion through the zodiac from Earth is uneven. During direct motion, Mercury spends roughly two to four weeks in each sign. Taurus is a fixed earth sign, the second of the tropical zodiac, ruled by Venus.
What the tradition makes of it
Mercury in Taurus is the mind at its most patient and its most stubborn. Thinking slows — not from diminished capacity but from a genuine preference for ground. Ideas are examined more carefully before they are offered. Positions, once formed, are held without much interest in revision.
The tradition values this placement for its relationship to the practical and the material: Mercury in Taurus thinks in terms of what can be built, what is durable, what has substance. Abstract ideas are held at some distance unless they connect to something touchable.
The shadow is rigidity. A mind that has decided tends to resist new information, and Taurus is the most fixed of the earth signs. Thoroughness can become refusal.
How to actually use it
Trust the slow process. This is good weather for work that requires sustained attention — for research, for construction, for the kind of thought that takes time but produces something solid. Do not rush a conclusion.
Notice if a position is being held out of genuine conviction or out of simple inertia. The distinction matters.
When in doubt
What do you actually know — not what you have been told, but what you have verified for yourself?