Mūlapaṇṇāsa Pāḷi (a) Mūlapariyāya Vagga

Mūlapariyāya Sutta
The Buddha explained the basis of all phenomena, specifying twenty-four categories such as the four elements (earth, water, fire, wind); sentient beings, devas; the seen, the heard, the thought of, the known; the oneness, the multiplicity, the whole; and the reality of nibbāna. The uninstructed worldling cannot perceive the true nature of these phenomena; only the enlightened ones can see them in true perspective.

Sabbāsava Sutta
In this discourse, mental intoxicants that beset the uninstructed worldling are defined, and seven practices for eradicating them are explained.

Dhammadāyāda Sutta
This sutta contains two separate discourses, the first one given by the Buddha, the second by the Venerable Sāriputta. The Buddha urged the bhikkhus to receive as their legacy from him the bodhipakkhiya dhamma only, and not material things like the four requisites. The Venerable Sāriputta advised the bhikkhus to lead a solitary life for attainment of jhāna and to strive for the attainment of nibbāna by abandoning greed, ill will, and delusion.

Bhayabherava Sutta
This discourse describes how a bhikkhu leading a solitary life in a secluded forest invites harm and danger to himself by his impure thoughts, words and deeds, and how the Buddha had lived a peaceful forest life harmlessly by cultivating pure thoughts, words and deeds which finally led him to enlightenment.

Anaṅgana Sutta
In this discourse given on the request of the Venerable Mahā Moggallāna, the Venerable Sāriputta explained four types of individuals:
(i) an impure person who knows he is impure;
(ii) an impure person who does not know he is impure;
(iii) a pure person who knows his own purity;
(iv) a pure person who does not know his own purity.

Ākaṅkheyya Sutta
This sutta describes how a bhikkhu should develop sīla, samādhi and paññā, instead of craving for gain and fame; how he should restrain his faculties, seeing danger in the slightest fault.

Vattha Sutta
In this discourse the Buddha explained the difference between an impure mind and pure mind by giving the example of a dirty cloth and a clean cloth. Only the clean cloth will absorb dye; so also only the pure mind will retain the Dhamma.

Sallekha Sutta
In this discourse the Buddha explained to Mahā Cunda how wrong views about atta and loka can be removed only by Vipassana insight. The practice of jhāna is not the austerity practice that removes moral defilements; it only leads to a blissful existence. Only refraining from forty-four kinds of bad deeds constitutes austerity practice for removing moral defilements. The volition alone to do a good deed is enough to produce a good result; when it is accompanied by the actual deed, the beneficial result accruing is immeasurable. One immersed in the mire of sensuous impurities cannot rescue others immersed likewise in the mire.

Sammādiṭṭhi Sutta
This discourse is an exposition on the right view, delivered by the Venerable Sāriputta at Sāvatthi. When physical, verbal and mental actions are motivated by greed, hatred and delusion, they are deemed to be bad. When they arise through non-greed, non-hatred and non-delusion, the actions are deemed to be good. Right View is understanding what a good deed is and what a bad deed is; it is the full comprehension of the Four Noble Truths and not holding on to eternity views concerning atta.

Mahāsatipaṭṭhāna Sutta
This discourse, given at Kammāsadhamma market town, is the most important sutta which gives practical guidance for cultivation of mindfulness. It describes the four methods of steadfast mindfulness, namely, contemplating the body, contemplating sensation, contemplating the mind, and contemplating the dhamma as the only way for the purification of beings, for the overcoming of sorrow and lamentation, for the complete destruction of pain and distress, for the attainment of the noble magga, and for the realization of nibbāna.

This sutta appears in identical form in the Dīgha Nikāya.