[474] **"A doubter should train in the path of knowledge (ñāṇapathāya sikkhe)":** knowledge (ñāṇa) itself is a path of knowledge; the object of knowledge is also a path of knowledge; the dhammas arisen together with knowledge are also a path of knowledge. Just as the noble path is the path of the noble ones, the deva path is the path of devas, and the brahmā path is the path of brahmās, even so knowledge itself is a path of knowledge, the object of knowledge is also a path of knowledge, and the dhammas arisen together with knowledge are also a path of knowledge.¹
**"Should train":** there are three trainings (sikkhā): the training in higher virtue (adhisīlasikkhā), the training in higher mind (adhicittasikkhā), and the training in higher wisdom (adhipaññāsikkhā).
What is the training in higher virtue? Here a bhikkhu is virtuous; he dwells restrained by the restraint of the Pāṭimokkha, accomplished in conduct and resort, seeing danger in the slightest faults; having undertaken them, he trains in the training rules. The lesser aggregate of virtue, the greater aggregate of virtue; virtue as the foundation, the beginning, the conduct, the self-control, the restraint, the mouth, the chief, for the attainment of wholesome dhammas — this is the training in higher virtue.
What is the training in higher mind? Here a bhikkhu, quite secluded from sensual pleasures … enters upon and dwells in the fourth jhāna — this is the training in higher mind.
What is the training in higher wisdom? Here a bhikkhu is wise, endowed with wisdom directed to arising and passing away, which is noble and penetrative, leading rightly to the destruction of suffering (dukkha). He understands as it really is (yathābhūta): "This is suffering" … he understands as it really is: "This is the way of practice leading to the cessation of suffering"; he understands as it really is: "These are the taints (āsava)" … he understands as it really is: "This is the way of practice leading to the cessation of the taints" — this is the training in higher wisdom.
**"A doubter should train in the path of knowledge":** a doubting person — one possessed of doubt, possessed of perplexity, possessed of wavering, possessed of uncertainty (vicikicchā) — should train in higher virtue, should train in higher mind, and should train in higher wisdom, for the attainment of knowledge, for the contacting of knowledge, for the realization of knowledge. Adverting to these three trainings, he should train; knowing, he should train; seeing, he should train; reviewing, he should train; steadying the mind (citta), he should train; resolving with faith, he should train; exerting energy, he should train; establishing mindfulness, he should train; concentrating the mind, he should train; understanding with wisdom, he should train; directly knowing what is to be directly known, he should train; fully understanding what is to be fully understood, he should train; abandoning what is to be abandoned, he should train; developing what is to be developed, he should train; realizing what is to be realized, he should train; he should practise, practise properly, and, having undertaken it, proceed accordingly. Hence: "A doubter should train in the path of knowledge."
¹ [Variant note in the Siam Raṭṭha edition: the Sinhalese and European (PTS) editions read *atthi*.]
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.