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.
These teachings are like a raft, to be abandoned once you have crossed the flood. Since you should abandon even good states of mind generated by these teachings, How much more so should you abandon bad states of mind!
Believe nothing on the faith of traditions, even though they have been held in honor for many generations and in diverse places. Do not believe a thing because many people speak of it. Do not believe on the faith of the sages of the past. Do not believe what you yourself have imagined, persuading yourself that a God inspires you. Believe nothing on the sole authority of your masters and priests. After examination, believe what you yourself have tested and found to be reasonable, and conform your conduct thereto.
All that we are is the result of what we have thought. If people speak or act with evil thoughts, pain follows them. If people speak or act with pure thoughts, happiness follows them, like a shadow that never leaves them.
When you know for yourselves, 'These things are wholesome; these things are blameless; these things are praised by the wise; these things, if undertaken and practiced, lead to welfare and happiness,' then you should engage in them.