Without approval and without scorn, but carefully studying the sentences word by word, one should trace them in the Discourses and verify them by the Discipline. If they are neither traceable in the Discourses nor verifiable by the Discipline, one must conclude thus: 'Certainly, this is not the Blessed One's utterance; this has been misunderstood by that bhikkhu - or by that community, or by those elders, or by that elder.' In that way, bhikkhus, you should reject it.
Develop a mind that is vast like space, where experiences both pleasant and unpleasant can appear and disappear without conflict, struggle or harm. Rest in a mind like vast sky.
Know from the rivers in clefts and in crevices: those in small channels flow noisily, the great flow silent. Whatever's not full makes noise. Whatever is full is quiet.
It is within this fathoms-long carcass, with its mind and its notions, that I declare there is the world, the origin of the world, the cessation of the world and the path leading to the cessation of the world.
Thus all things are subject to death, sorrow and suffering. I became aware that I too was of the same nature, the nature of beginning and end. What if I searched for that which underlies all creation, that which is nirvana, the perfect freedom from unconditioned existence?