Thanissaro Bhikkhu on Refreshing Breathing

"You’re perfectly free to breathe in any way you like, perfectly free to try deep breathing, say, for a while, to see if it feels really good. There’s nobody out there to say, “Well, you failed that test, or you are not right, this is not as comfortable as it could be.” You’re the one who is gauging the results, and it’s up to you to decide what feels good over the long term. Sometimes you’ll find the rhythm of the breathing will change, as your physical condition changes, as the mind begins to settle down. Other times you’ll find there is a fairly steady rate that feels good, and all you have to do is stay with that steady rate. But it is entirely up to you. After all, this is a time for the mind to look after itself, and so it has the freedom to decide what to do with the breath." ~ Thanissaro Bhikkhu "Our Primary Responsibility"

"You’re perfectly free to breathe in any way you like, perfectly free to try deep breathing, say, for a while, to see if it feels really good. There’s nobody out there to say, “Well, you failed that test, or you are not right, this is not as comfortable as it could be.” You’re the one who is gauging the results, and it’s up to you to decide what feels good over the long term. Sometimes you’ll find the rhythm of the breathing will change, as your physical condition changes, as the mind begins to settle down. Other times you’ll find there is a fairly steady rate that feels good, and all you have to do is stay with that steady rate. But it is entirely up to you. After all, this is a time for the mind to look after itself, and so it has the freedom to decide what to do with the breath." ~ Thanissaro Bhikkhu "Our Primary Responsibility"

"Exactly what are you doing with the breath right now? Is the breathing a totally passive, automatic process, or are you doing something to the breath? Is there some level of the mind that’s making decisions? One way to find out is to make conscious decisions about the breath, nudging it a little bit here, a little bit there. We’re not talking about making huge differences in the breath, just making gradual changes in whichever direction seems most comfortable." ~ Thanissaro Bhikkhu "Mastering Causality" (Meditations1)