1- why do people say that you need to know yourself ? If you don't know yourself at age 25 at least, I don't know what the hell you have been doing in life, you are born, you know what you do, your likes and dislikes, you can improve yourself knowing this, so...I think people know themselves, they are just afraid to act decently when they know others !
2- Putting people on the same basket as those that hurt you, thus creating the idea that one is equal to all the others, this is a load of crap, I mean really, if people hurt you, tell them to fuck off, but do not say that all men/women are the same, that shit is annoying, and if you keep surrounding yourself with shitty people don't expect improvement, open your eyes and change it !
3- Don´t hurt people that love/like you, go hurt people that don't like and hurt you they deserve it, not those who care !
Be a better person, don't be a cunt !