I agree you need to push yourself to grow. I don't know what "fast enough" is supposed to be measured by, I guess that depends on your personal goals. But you

I agree you need to push yourself to grow. I don't know what "fast enough" is supposed to be measured by, I guess that depends on your personal goals. But you clearly have never experienced burnout. "One step below" is dangerously close to the precipice. If you cross the threshold (real life is too unpredictable for tight-rope walking), burnout is not a simple matter of taking that one step back. Recovery takes disproportionately more time than that. And you may not notice you've gone too far before you're already well in. You may cause long-lasting damage. You may wreck your career. You will learn an important lesson or two about what is "fast enough" for what is important in life :) Analogy: Keeping your flammable documents exactly one degree below combustion temperature. While playing with fire.