Mindfulness Of Breathing Body

So the text we’re exploring is the Anapanasati Sutta which literally means, “Discourse on Mindfulness of Breathing in and Breathing out. And the instruction offers 16 steps and they are divided into four categories called tetrads. And they correlate with the four foundations of mindfulness. So the first one has to do with the body, the second with feelings, the third with the mind, and the fourth, with the unfolding process of liberation.