If there's one responsibility, that I would have to select as the most important one for all human beings. It'd be the obligation to know who you are.
By this, I don't mean to create a story about yourself, make it your identity and then go to the world with a fixed view, justifying your actions with the story you conceived about you.
Knowing who you are is not a story you adopt about yourself about something that happened in the past. It is not an expectation you put on yourself about something that is supposed to happen in the future.
Knowing who you are is in nature, not judgemental. It is a process. A road of reflection. A road of constant awareness. It can only come from a place of presence and it simply means that you are aware of how your emotional being and your rational being respond to your surroundings.
We are changing, evolving. How can we really get to know something that is constantly transforming itself?
It's simple, by observing it.