We form our character by being ourself. But being ourself is defined by us as well as others. We have our state of mind at every moment of time called state character. This is the state that we see ourself and others through. Our character forms every time we try to make a decision. It can improve or refute and have different properties. We can change the surface of this state or we can change it deeply. This is dependent on our decisions and how we act.
We are all in the same state when it comes to life decisions but yet different in what we do. We have our unique way of living tailored to us and this is dependent on our background. This is part of our character formation.
How we think about ourselves and our choices depends on our perception and our life in general. At any point we may make right or wrong decisions, the point is trying, trying to better our character, and our life.