6. The concept of Society is definitely good as long as it protects the positive/benevolent interestes of an individual & not victimize him/her.
7. We need to have some proof if we want to convince others cause they have to be sure that we are telling the truth & have a valid reason to say the particular thing. But if you don't worry about convincing others & say things truthfully, then you don't need any proof. Cause you know you are telling the truth & so it shouldn't affect you if others believe you or not. The main thing is that you have to be Honest to yourself to eliminate any feelings of guilt. In such case, others belief on you will depend on their trust on you.