About This Answer
A meditator describes a perception that the breath, and the awareness knowing it, are being created by the mind, as if the whole world were the mind's own imagining rather than existing by itself. This throws the questioner into speculation about the nature of the world and the mind, and the question is how to work with it.
Ajahn Dtun's answer, through the interpreter, is to keep developing mindfulness and practising concentration. With sharper mindfulness and samādhi one gains greater skill in knowing the workings of one's own mind, so when such natural phenomena arise, one will see clearly what is actually taking place.
Doubts will keep coming, and it is good to cut through them and stay with the meditation object, making the mind one-pointed. When these natural phenomena come in during practice, pay no attention to them: let them come and let them go, and stay with the object of meditation or theme of contemplation.