Nick Perry argues that successful people don't judge your discipline because they understand sacrifice. The loudest critics are those stuck in their own lives, envious of your progress. Stop caring what people who've built nothing think about your choices.
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Most people get this completely wrong about who's actually judging you. See, you think the people ahead of you are the ones looking down, but richer people don't judge you for saving your money because they did the same thing to get where they are. Fitter people don't judge you for cutting your calories because they know what that discipline costs. Higher status people don't judge you for cutting bad friends because they cut theirs a long time ago. That's why the judgment comes from the people going nowhere because they have nothing else to do. And the ones who quit on their own dreams are always the loudest about yours because your progress reminds them they quit. So stop letting people who've never built anything judge what you're building.