It seems that all meditation techniques have the same basis which is to learn to be honest and warm-hearted towards ourselves in order to truly know ourselves in mind, body, emotions, and spirit. And no one can know these truths but ourselves. Pema Chodron calls this nontheistic. Nothing to do with belief in God, but rather that only only I can know myself, only you can know yourself. No one but you can discern what to accept and what to reject.
So there is a requirement of each of us to take this pursuit on relentlessly whether in meditation or real life. We pay attention to our breath, what is in our head, come back to the present moment, notice we are thinking or judging by naming the action, back to the breath, or the noticing of thoughts, back to the present moment, and so on. And in this process continue to be as warm and gentle and honest, eventually learning who we truly are and what it means "to let go of holding on and holding back" (Pema Chodron). Thus, ultimately, strong feelings or reactions to events don't clutch and hold us, rather we exist, experience, and move on.