I’ve seen a lot of truth in this over my working life — through the PC era, mobile phones, solar power, and now AI. The people who tried hardest to use me or knock me down usually showed up right when something was actually going well. But I’d add one caution. Not everyone who doubts you is wrong. Sometimes criticism is just criticism, and it’s actually true. The real skill — one I’m still learning now, oddly, as an older doctoral student — isn’t just “ignore the haters.” It’s learning to tell the difference between criticism that means you’re doing something right, and criticism that’s trying to help you fix something. So yes, when it stings, it might mean you’re onto something. But it’s also worth asking yourself honestly: is this person right?