"Curiosity is a sign of mental and imaginative engagement with life." (Babara Ann Kipfer-1001 Ways to Live in the Moment)
Some people are not curious in their life. Some people think their life is the only way to live and want to show everyone how they live their life so those other people can live their life the same way. They usually aren't interested about anyone else's life and what they are doing in their life. Quite often these people judge other's success, worth and appropriateness against their own way of life which can bring about a belief that if you aren't doing things the same as them, then there is something wrong with you or your way of life.
Being curious about others keeps you learning and creative and can also decrease your judgement of others. When was the last time you had a conversation with your friend or spouse and completely listened to what they were saying? Instead of thinking about whether what they have done is right or wrong, focus on their words. Be curious about what they are saying and seek to hear more of their story. When you are curious about others, you get to find out a lot more about them and being curious and inquisitive also helps to build stronger bonds with people.