Senior leaders now value candidates who ask excellent questions and are eager to solve problems over those who act like they know everything. This represents a significant shift from valuing 'knowers' to valuing 'learners' in the workplace.

Seemingly harmless jokes and dismissive attitudes about aging are not benign. The World Health Organization found that older adults with negative self-perceptions about their own aging live, on average, 7.5 years less than those with positive views, making the psychological impact of ageism a significant public health hazard.

The more people learn about a subject, the more they realize how much they don't know. This contradicts the idea that expertise leads to arrogance. Novices, who are unaware of a field's complexity, are often the most overconfident.

Successful, long-standing organizations risk conflating their identity (how they operate, e.g., "active global investor") with their purpose (the ultimate mission, e.g., "maximize return"). Leaders must constantly challenge whether their established identity still serves the core purpose, avoiding decisions that merely preserve the status quo.

If a decision has universal agreement, a leader isn't adding value because the group would have reached that conclusion anyway. True leadership is demonstrated when you make a difficult, unpopular choice that others would not, guiding the organization through necessary but painful steps.

Traits like extreme responsiveness, which earn praise early in a career, can lead to burnout and poor prioritization at senior levels. Leaders must recognize when a once-beneficial belief no longer serves their new, scaled responsibilities and becomes a limiting factor.

The pace of change in AI means even senior leaders must adopt a learner's mindset. Humility is teachability, and teachability is survivability. Successful leaders are willing to learn from junior colleagues, take basic courses, and admit they don't know everything, which is crucial when there is no established blueprint.

Contrary to common belief, feeling fear is not what prevents leaders from being courageous. The real barrier is the defensive "armor"—behaviors like micromanagement or feigned intensity—that leaders adopt when afraid. The path to courage involves identifying and shedding this armor, not eliminating fear.

When a senior leader feels intense, disproportionate urgency, the motivation may be personal rather than organizational. For leader Mo, her impatience stemmed from viewing her role as the "final chapter" of her career. Recognizing this reframed her goal from "completing the work before I leave" to "ensuring the work has lasting impact after I'm gone."