How do I keep being the ethical voice when it's exhausting?

You hold the line on ethics without flinching, and you are tired, tired of being the conscience in rooms that would rather not have one. That exhaustion is real and earned. Being the one who says the hard thing, again and again, wears on a person. Do not mistake the fatigue for a reason to stop. What you carry is a burden precisely because it matters. The rooms that resist a conscience are the rooms that most need one. Your steadiness is not making you naive or difficult; it is doing quiet work you may never be thanked for, keeping people out of harm they cannot yet see. That is worth being tired for. But you cannot pour from an empty cup, so tend yourself too. Find one other person who shares your standard, even outside your workplace, and lean on them so you are not always the lone voice. And pick your battles, not every hill, only the ones that matter. You will last longer, and lasting is how the line stays held.