Investigation

22 discourses
Investigation involves the process of inquiry, examination, and discernment of mental qualities to understand their true nature and support the development of wisdom and awakening.
Also known as: inquiry, examination, analysis, exploration
Pāli: vicaya, vīmaṃsā, parikkhati

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The Buddha uses a simile of a bronze cup of beverage mixed with poison to illustrate how craving for agreeable and pleasant sense experiences leads to acquisition and suffering, while wisely seeing their impermanent nature leads to the ending of suffering through the abandoning of craving.

MN 47 Vīmaṁsaka sutta - Examining How to investigate a potential teacher

The Buddha provides a detailed and rigorous method for examining a Teacher. By discerning the teacher’s mental qualities, through prolonged observation, questioning, and learning directly, one gradually realizes a certain aspect of the teaching and builds unshakeable confidence in both the teacher and the teachings.

ITI 94 Upaparikkha sutta - Examining how there can be a fruitful investigation

The Buddha instructs that one should examine experience in such a way that consciousness does not become scattered among external sense objects, fixated internally, or entangled through grasping.

MN 95 Caṅkī sutta - With Caṅkī dependent sequence of qualities that lead to awakening

The Buddha answers the questions of the reputed brahmin Caṅkī

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In The Path of Dhamma (Dhammapada)

Dhammapada verses 221-234 emphasize abandoning anger, conceit, and mental defilements while cultivating restraint in body, speech, and mind. The verses highlight overcoming harmful actions by giving and speaking truth, the inevitability of criticism, and the value of moral discipline. Those intent on Nibbāna, ever watchful, and well-restrained are beyond reproach and honored even by the gods.

Dhammapada verses 360–382 depict the ideal bhikkhu as one who restrains the senses, body, speech, and mind, leading to freedom from suffering. Emphasis is placed on mindfulness, inner joy, collectedness, and self-reliance. Through discipline and reflection, the bhikkhu advances towards the peace of Nibbāna, shining like the moon freed from clouds.

In As It Was Said (Itivuttaka)

A bhikkhu endowed with two qualities of being moved on occasions that inspire a sense of urgency and by wisely striving when aroused with urgency, dwells in the here and now with abundant ease and joy, and his mind is directed towards the wearing away of the mental defilements.

The Buddha describes the subsequent training guideline to virtuous conduct - to practice being free of the unwholesome states craving, ill will, dullness and drowsiness, restlessness and worry, and doubt while walking, standing, sitting, and lying down.

In Middle Length Discourses (Majjhima Nikāya)

The Buddha explains how to completely comprehend the gratification, drawback, and escape in the case of sensual pleasures, form, and felt experience.

On being asked about his teaching and what he proclaims, the Buddha describes non-conflict as the goal of his teaching and proclaims a state where perceptions do not lead to preoccupation. Venerable Mahākaccāna elaborates on this by thoroughly examining the dependent arising of phenomena, beginning with the six sense bases—eye, ear, nose, tongue, body, and mind.

The Buddha expounds the noble right collectedness complete with its supporting conditions, clarifying how the factors of the noble eightfold path give rise to either mundane or supramundane fruits. He shows how right view leads to the sequential development of the path, culminating in right knowledge and right liberation.

The Buddha teaches in detail how to develop mindfulness while breathing in and out through sixteen naturally unfolding steps, showing how their cultivation fulfills the four establishments of mindfulness, which in turn fulfill the seven factors of awakening, culminating in true knowledge and liberation.

The Buddha provides a detailed analysis of the six sense bases, differentiating worldly feelings based on attachment from those born of renunciation and insight. He outlines a progressive path of abandoning lower states for higher ones, guiding practitioners through refined meditative states toward complete liberation.

In a chance meeting, the Buddha, unrecognized by the bhikkhu Pukkusāti, teaches him to deconstruct experience into six elements, six fields of contact, eighteen mental explorations, and four foundations. He further reveals that all notions of self—such as “I am this” or “I will be that”—are mere conceptions, inherently afflictive, and the peace of Nibbāna is realized by overcoming all conceptual proliferations.

In The Buddha's Ancient Discourses (Sutta Nipāta)

The Buddha’s serene conduct on an alms round catches the attention of King Bimbisāra. In the ensuing encounter, the king offers him wealth and royal pleasures, but the Buddha shares his insight on the drawbacks in sensual pleasures, his view of renunciation as security and where his mind delights in.

In Linked Discourses (Saṃyutta Nikāya)

Household Anāthapiṇḍika, after passing away, appears as a young deity and recites verses to the Buddha on the value of thoroughly examining the Dhamma.

The Buddha recounts how he attained full awakening by examining the principle of dependent co-arising. He likens this realization to a man discovering an ancient, forgotten city.

A bhikkhu asks the Buddha if there exists any form, feeling, perception, intentional constructs, or consciousness that is stable, enduring, and not subject to change.

The Buddha presents a simile of the nāgās, serpent beings, who rely on the Himalayas to nurture their bodies and acquire strength before entering the ocean, as a metaphor for the bhikkhu cultivating the seven factors of awakening to attain greatness and expansiveness of mental qualities.

Venerable Sāriputta explains how he can dwell in any of the seven factors of awakening at will, knowing their qualities and conditions. He likens this mastery to a king or royal minister freely choosing garments from a wardrobe for morning, midday, or evening wear.

An analysis of the four bases of psychic powers that are endowed with collectedness arising from aspiration, determination, purification of mind, and investigation.

In Numerical Discourses (Aṅguttara Nikāya)

The venerable Nandaka teaches Sāḷha and his friend about how to independently verify the unwholesome and wholesome mental qualities.

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