"If it is not right,
                               do not do it;
                             if it is not true
                              do not say it."
                         ~Marcus Aurelius

     When you know that something is wrong doing then you shouldn't do it. Even if it might affect you or someone else wrong is wrong even when you don't think so at first. Same goes for telling the truth. When you know something isn't true then don't say it because it can have negative consequences later on. For example if you say a false statement to a group of a friends or just a friend, like a gossip about someone else then eventually that gossip will spread around knowing that it is a false rumored you invented about a person and then you will get deeply into trouble. Another example, if your parents don't allow you to have friends over when there not home then you shouldn't be disobeying them. Maybe ask for permission once in while but if they say no then they meant it. And if you do your actions will have consequences. If they have suspicion that you didn't obey them and they ask you about it then you have to tell them the truth. Because like wise they'll find about it later and punish you more for both breaking their rules and lying to them. So its better to speak up with the truth now then later. Or better yet just don't disobey them at all and do the right thing.