Mark Twain said, “All you need in this life is ignorance and confidence, and then success is sure.” We see stupidity and confidence in any number of successful people these days. (I’ll let you decide who they might be.) Confidence comes in handy but, like beer, too much just isn’t in your best interest. It’s a balancing act; showing true, quiet confidence in the right situations and with the right audiences is great for your success and credibility, but with people who are emotionally driven and deeply concerned about you and what you’re saying, your confidence often feels like arrogance. That’s not helpful, but a little humility is. And overconfidence isn’t that great for making good decisions.