It is a pity that sometimes what we said makes our friends  or families unhappy. although we don't cause this situation, it happened. And if we usually say things without thinking, our friends may be eventually leave you. 

This is not an exaggeration. A thoughtless remark will make others feel embarrassed hurt other's feelings. Can you like this situation?  You don't also have this experience, I bet. Heart to heart. We must, therefore, always think before we speak.