The Noble Eightfold Path is the Middle Way and the fourth noble truth. Its eight factors are right view, right intention, right speech, right action, right livelihood, right effort, right mindfulness, and right collectedness or concentration. "Right" translates sammā: complete, harmonious, and oriented toward liberation. It is not merely being correct in an argument.
The factors are often gathered into three trainings. Wisdom (paññā) includes right view and right intention. Ethical conduct (sīla) includes right speech, action, and livelihood. Collectedness (samādhi) includes right effort, mindfulness, and concentration. The grouping shows why one favorite practice cannot replace the whole path. Meditation without ethical restraint is unstable; morality without wisdom may remain conventional; intellectual understanding without cultivation does not uproot habit.
Right view begins with moral causality—actions have results—and matures into knowledge of the Four Noble Truths. Right intention inclines toward renunciation, goodwill, and harmlessness. Right speech abandons lying, divisive speech, harsh speech, and idle chatter. Right action abandons killing, stealing, and sexual misconduct. Right livelihood earns a living without betraying the path.
Right effort prevents unarisen unskillful states, abandons arisen unskillful states, arouses unarisen skillful states, and maintains arisen skillful states. Right mindfulness establishes clear observation of body, feelings, mind, and Dhammas. Right concentration is defined in many early discourses through the four jhānas, increasingly unified states free from the five hindrances.
The Great Forty (MN 117) explains that right view runs at the front, recognizing wrong and right factors. It also distinguishes ordinary wholesome path factors from noble factors directly connected with awakening. The path is cultivated over time, yet at liberating insight its factors converge. Do not picture eight stepping stones that are completed and discarded one by one. Picture eight strands braided into a single rope.
The Buddha places right view at the front of the path. A practitioner must recognize wrong view as wrong and right view as right; right effort works to abandon one and enter the other, while right mindfulness remembers and monitors the task.
The wanderer Upatissa, later Sāriputta, sees the serene monk Assaji and asks about his teacher. Assaji modestly says he is newly ordained, then gives a brief teaching: phenomena arise from causes, and the Buddha teaches their cessation. Upatissa realizes the Dhamma and shares it with Kolita, later Mahāmoggallāna.