If this trine sits in your natal chart, the odds are you've long since grown used to it and don't count it as anything special. That's how it tends to go with flowing aspects from an outer planet to a personal one: the resource is so built into your background sense of yourself that you assume everyone has it. They don't, as it happens.
Mars in the chart governs how you act — how quickly you decide, how you meet resistance, how much fuel you have in a day. Pluto governs depth: the capacity to go through real change, to sit inside a crisis, to come out the other side of a loss as someone slightly remade. When a trine links the two, these functions work in step. Your action arrives backed by a deep reserve. Your will has weight to it. And the most noticeable part: under stress, the thing that switches off in other people switches on in you. When everyone around you is running on empty, you tend to find a second wind.
You can see it in some very concrete ways. You rarely stay ill longer than a few days; the body bounces back to baseline quickly. You take physical exertion well and often feel more alive after a hard session rather than wrecked by it. You can keep at a single task for a long time — writing, running, accounting, mending — without the mental fatigue that derails most people. Crises like redundancy, a move, a divorce or a serious illness in the family aren't lighter in content for you, but they're faster in recovery. Two months after a blow that would lay someone else flat for half a year, you've already settled into the new shape of things.
Now, honestly, the other side. The first problem is undervaluing the resource. Someone with this trine often thinks, "Well, I just got on with it, anyone would have." And misses that the people nearby didn't get on with it. Out of that undervaluing grow two things: you don't give yourself any credit for what you've come through, and you can't understand why everyone else moves so slowly. From there comes a quiet dissatisfaction with the people around you, a sense that they're all somehow weak, and a gradual drift into isolation.
The second problem is the laziness that comes of abundance. When the resource is always to hand, there's no inner prompt to stir yourself in advance. Plenty of people with this trine only engage in an emergency and otherwise coast along like everyone else. The talent is there, the potential is there, and not much of it makes it onto the scoreboard. It stings particularly, because from the outside it looks like simple lack of effort. In truth it's that effort was never a habit — things kept working out without it.
The third is the pressure you put on people. You experience your own force from the inside as neutral — "I'm only talking", "I wasn't even insisting". From the outside it often reads as a shove. And when people back away, you're genuinely puzzled. This is where a deliberate effort helps: noticing the moments when you're already in third gear and the person opposite is still in first.
So what do you do with this trine like a grown-up? Stop treating it as a given, for one. If there's a long project in front of you, take it on and go. If there's a dream you've been too frightened to commit to, it's more within your reach than you think. If you sense you've been living off the reserve for a long time without rest, rest before the body forces the matter through illness. And learn to feel some gratitude for what you've already come through, because strength that goes unnoticed slowly curdles into bitterness. To see exactly how the trine plays out for you, the sign each planet sits in, the houses involved, and the aspects to other planets all have to be read together — none of this is a forecast, only a map of tendencies.