Elon Musk’s ex-wife, Justine Musk, has revealed that one of the key drivers behind his success is his strong ability to say “no.” She explained that Musk fiercely protected his time, energy, and focus, using discipline to shut out distractions and stay committed to his larger goals. Justine noted that every “no” was a conscious step toward his vision, helping him prioritize what mattered. She also learned the value of boundaries through him — a mindset echoed by other innovators like Steve Jobs.