It is important for you to realize something which might have escaped you until now. Everything you do is considered an action. Even if you do nothing, it is still considered an action(non-action). And all actions have two things in common (a) consequence and (b) reaction.
If you do nothing, there will be a consequence for doing nothing and there will also be a reaction from those who are around at the time you do nothing. Now, if you do nothing and then someone else is harmed by something you could have prevented, but did nothing to prevent it, then the reaction you will receive will not be of the expected result of you doing nothing. Meaning, that you might think that doing nothing is fine and see no problem with doing nothing, but because of ego you fail to realize it was your responsibility to prevent it from happening. Conscience would have been screaming at you to do something, if anything to help.
If you do something without looking for the consequences and reactions, then you are committing a really bad decision. Why? If you don't pay attention to the consequences and possible reactions, then you are not properly understanding what it means to live within a civilized society. Self responsibility is a must and you must be responsible about holding yourself accountable for your own actions which do damage to other people's life.
If you steal something from someone, then you should return it, in some form. Stealing isn't right and most people know it, but some people believe it is alright to do, under specific circumstances. Example: a child steals a piece of pie from a store because s/he is homeless and starving? Isn't it more humane to feed them?
As you can see, there's always a time and place for everything and when you are in the right place at the right time, you will become either a student or a teacher. Please beware that these times are missed by most and never even recognized on purpose because of ego. Being a student or teacher has no place for ego. Why not? Because most ego driven actions are damaging, unless they don't involve other people. Remember, an ego driven action can harm you, if you are unaware of the action you are taking.
Thank you for your time.