What it does to a planet
Taurus slows a body down and makes it steadier. Mercury in Taurus thinks slowly and changes its mind almost never; Venus in Taurus is at home and attaches deeply; Mars in Taurus is remarkably hard to provoke and equally hard to stop once moving.
The mechanism is not laziness. It is a preference for doing something once, properly, rather than repeatedly in different directions. That produces genuine durability, and it also produces a real difficulty with abandoning something that has stopped working.
Why fixed earth is the most stubborn combination
Fixed signs hold a position; earth signs deal in what can be touched and counted. Taurus is both, which makes it the least persuadable sign in the zodiac. Argument does not move it, because argument is air; urgency does not move it, because urgency is fire. What moves Taurus is a change in the material facts, and nothing else reliably does.
Venus in a different mode
Taurus is ruled by Venus, but it is a different Venus from the one that rules Libra. The Libra version is social and comparative; the Taurus version is sensory and possessive. A Taurus placement is read against wherever Venus sits, and if Venus is in an airy or restless position the placement loosens noticeably.
The misreading
Taurus is called lazy, which is a misdescription of pace. The sign will work extremely hard for a long time; what it will not do is hurry, and it will not perform urgency it does not feel. In a culture that reads speed as effort, that looks like sloth.
The genuine difficulty is inertia in the technical sense: Taurus is as hard to stop as it is to start. Scorpio opposite is where the correction lives, in the willingness to let something end.
Taurus and money, in practice
The association with wealth is overstated and the association with security is not. Taurus placements are usually careful rather than rich, and the carefulness has a specific shape: a strong preference for owning outright over owing, and a distrust of arrangements that depend on someone else's cooperation.
That shows up as a resistance to debt that can be either prudent or limiting depending on circumstances, and as a willingness to spend well on a small number of durable things while economising sharply everywhere else. Read against the second house and Venus, this is one of the more reliably observable patterns in a chart, and it explains a good deal of spending behaviour that looks inconsistent from outside.
Questions people ask about this
Are Taurus placements really stubborn?
Resistant to persuasion, yes. The sign changes on evidence rather than on argument or pressure, which reads as stubbornness from outside.
Is Taurus the same as Venus?
No. Venus rules Taurus, so the two are read together, but Venus in Libra behaves very differently from Venus in Taurus.
Why does Taurus care so much about comfort?
It is a fixed earth sign, so security is measured in physical, repeatable terms rather than in reassurance.