The Three is the thing growing; the Four is the thing standing firm. The number itself is stability: four sides, four corners, four legs. So Fours in every suit are about structure and pause — Four of Wands the finished canopy and the celebration, Four of Pentacles the figure clutching coins, Four of Swords the knight lying in rest, Four of Cups the seated figure looking at cups without reaching.
You can see the Four has two faces: the steadiness of the Four of Wands is celebration, the steadiness of the Four of Pentacles is gripping. Stability and stagnation are two names for the same thing; the difference is how long you've stopped and whether anything is still allowed in.
Where you'll recognise it: the stretch when things finally stop moving — relief, boredom, usually both. Running well, a Four is making camp: rest, digest, lay the foundation properly. Stuck, its problem is not wanting to leave camp — because outside the camp is the Five. But the line moves forward. A Four isn't a destination; it's a waystation.
