Re the actual subject of this thread - it's not black an white/right or wrong. Each instance must be considered on its own. I don't believe in lying, but sometimes I don't say anything if the truth serves no purpose, or if it will make things worse. You have to decide if you're simply getting something off your chest, or whether the other person needs/wants to know. You also have to consider whether you don't want to tell the truth because it's uncomfortable for you. Sometimes trust involves a willingness to be uncomfortable at times.