The short answer
Doubt and authority aren't opposites. Leaders who sit with genuine uncertainty are often the most trustworthy ones in the room. The gap you feel is not a flaw to hide — it's a sign you're taking the work seriously. You don't need to close that gap. You need to stop treating it as a threat.
You're the recognised expert, and people look to you for answers. But inside, you're waiting for the moment someone realises you're not as certain as you sound. That tension is real — and it's exhausting. Research on public leadership points to something important here: leaders dealing with complex, messy problems — the kind that don't have clean solutions — cannot be certain. The work itself doesn't allow it. So the gap you feel isn't a personal failure. It's the honest response to genuinely difficult territory.
Marcus Aurelius wrote: 'Be neither a great talker, nor a great undertaker.' He wasn't advising leaders to go quiet. He was saying: don't overclaim. Don't perform more than you actually have. The person who speaks with quiet precision — who says 'here is what I know, and here is where it gets hard' — carries more real authority than the one who performs certainty. Your private doubt is closer to wisdom than the confident front you think people need to see.
This week, try one small thing. In one meeting or conversation, say out loud: 'I'm confident about X. I'm still working through Y.' Just once. You don't have to confess all your doubts — that's not the point. The point is to let your public voice and your private thinking get a little closer together. That's not weakness. That's the kind of leadership people actually trust.