Zen practice is about awakening to this very moment. There is no other function of Zen or Chan or Son Practice. We can learn liturgy. We can know how to chant well. We can eat a formal meal perfectly, yet none of this is the Zen that Sakyamuni Buddha taught. Zen is waking up to the present. Just this, just now, only this moment.
How can we express this in the scriptures? Just breathe, just know that we are alive.