Thich Nhat Hahn from the Zen Tradition using the Christmas story as a way of teaching how to meditate:
I am going to remind you of the way to practice. First, “in” and “out.” It means that when I breathe in, I know I am breathing in. It’s easy. And when I breathe out, I know I am breathing out. I don’t mix the two things up. Breathing in, I know it is my in-breath. Breathing out, I know this is my out-breath. By that time, you stop all the thinking, you just pay attention to your in-breath and your out-breath. You are 100 percent with your in-breath and your out-breath.
It is like holding a baby in such a way that you hold it with 100 percent of yourself. Suppose this is a baby and I hold the baby like this. I hold the baby with 100 percent of myself. Remember, there are times when your mother holds you like this. Have you seen the image of the Virgin Mary holding the baby Jesus? She holds him like that: 100 percent. So here, our in-breath is our baby, and we hold our in-breath 100 percent. “Breathing in, I know that I am breathing in.” You just embrace your in-breath, nothing else. Don’t think of anything else. That is the secret of success.
Thich Nhat Hahn