Sounds like the buddha's middle path (that's a half serious remark). Those books also add that it's important to keep your thoughts, emotions, words and actions

Sounds like the buddha's middle path (that's a half serious remark). Those books also add that it's important to keep your thoughts, emotions, words and actions aligned, but like you say, nowhere those books say that you should express your opinion unprompted on every corner, and silence is a good answer when truth would only make things worse.