Good for you Trog! There's what happens and what we make it mean, and good move on changing your beliefs and reframing what things mean to manage your emotions around it. Another piece that is helpful is to feel the emotion but not be it, feel the emotion but stand off to the side of it a little, make it something you're experiencing but not a part of you. Who you are is timeless but emotions are fleeting and will pass, and watching them from that detached place is powerful.
Yes, I think we can class that also as surrender? Feeling the emotions, not labelling them good or bad, not judging yourself, allow yourself to feel them and not define you. It's a 'this too shall pass' philosophy with the added dimension of understanding that we are so much more than this experience. It does not define us. We just learnt a little bit more about who we 'are not' and what we do not want in our lives.