Why everyone has blind spots

The Johari window, a simple model from psychologists Joseph Luft and Harrington Ingham, splits what is true about you into four boxes: known to you and others, known only to you, unknown to anyone yet, and known to others but not to you. That last box is your blind spot.

It might be how you come across in meetings, a habit of interrupting, a tone in messages that sounds harsh, or a strength you have never noticed. You cannot see it by thinking harder, because the information is in other people's heads. The only way in is to ask, and to make it safe for people to tell you.