Those we've come to admire withstand the tests of time through hallmarks of personal and professional endeavors. They strive for consistent, not perfect, behavior such as keeping their word and telling the truth, both building blocks of one's reputation.
Self-aware and self-controlled. A great leader is first a leader in their own life. Those who sustain success do so out of practiced personal and professional self-discipline. Underscore the word practiced.
Inexperienced leaders tend to borrow their success from others. Seasoned leaders own their success through learnings gleaned from the right experiences.
Do CEOs make mistakes? Of course. But they generally don't make the same mistakes twice.