Character?

It isn't what we think or feel, but it is the choices we make, including those to redirect our thoughts and feelings.  I started to suggest that those are simply brain chemistry, but maybe that's true of our choices, too.  At any rate, I believe our character lies in our choices, our decisions to do what the person we aspire to be would do, to live as the best-version-of-ourselves even when some part of us might want to choose another direction.  It isn't the disregarding of our thoughts and feelings, but putting them into their proper context.  It is choosing to be a loving person, doing what is best for the ones we love rather than what we think will bring us pleasure or satisfaction.

That all sounds harsh, though.  It is loving ourselves enough to be molded or grown into a better person.  It is doing what we think is right not out of sheer, imposed discipline, but because what we desire more is to be the person we know we're growing into, ultimately the very presence of Christ in the world through submission to the Father's will in the grace and power of the Holy Spirit.