I have worked with leaders for 17 years. But I'm also a leader myself, and I can honestly say I feel deeply the privilege and responsibility that come with being a CEO. It is incumbent upon us to become all we can be, not only for ourselves, but for our companies.

We become overly reliant on the strengths that got us where we are today. We also become isolated as we move up in the organization. Unless we have the benefit of assessment, and unless we invite feedback on our leadership, we continue to lean on strengths that can actually work against us, and fail to expand our leadership style in a way that makes us more effective.

People believe what they see.

Executive presence has to do with the whole of the person. It's much more than presentation skill, charisma or savvy. It shows up in three dimensions of the leader's persona - character, substance and style. It's now clear that for a leader to influence and make an impact, it is important for them to also develop qualities such as authenticity, integrity, resonance, practical wisdom, and vision.

For years when we went into companies to discuss how we could help their leaders be most effective, we heard people say, "Our leaders need to develop executive presence."

We must reflect a holistic view of the leader, in three dimensions, character, substance and style. Character consists of the qualities that win trust whereas substance consists of the qualities that earn us credibility; style is the dimension of execution - getting others to get things done.

Many leaders rely on confidence, the ability to make timely decisions, and hold themselves and others accountable. But some of these leaders have not yet developed resonance, the ability to read the room, understand and appreciate the thoughts and emotions of others.