In life, you need to speak out on some situations to some people and keep quite at other times. One must be careful of when to speak, or otherwise to keep quite.
I am a teacher by profession. The other day a new teacher, about ten years senior in age joined the school. We became friends and started to spend time and to share a lot of views. She was always smiling, glowing and loving. She completed her job efficiently. All praised her work, and the personality.