Yes, enlightenment is possible through vipassana alone, though most traditions recommend samatha as foundational support.
The Buddha taught multiple paths to enlightenment, and the earliest suttas do not make jhanas (meditative absorptions) an absolute requirement. The Dhammapada and many Pali Canon texts describe awakening occurring through insight alone. However, the suttas consistently emphasize that concentration (samadhi) of some kind is necessary—the question is whether this must be the deep, stable concentration of samatha (calm meditation), or whether the concentration developed during vipassana itself suffices.
The Satipatthana Sutta, foundational to vipassana practice, makes no explicit mention of jhanas as prerequisites. It describes systematic observation of body, feelings, mental states, and mental objects as sufficient for liberation. Yet the sutta also mentions practitioners who develop both calm and insight.
Traditional Theravada commentarial literature, particularly the Visuddhimagga (Path of Purification) by Buddhaghosa, suggests that some degree of samatha practice is beneficial, even if not absolutely mandatory. The commentaries distinguish between "momentary concentration" (bhavanga samadhi), which can arise during vipassana, and the fuller concentration of samatha. Momentary concentration may provide sufficient stability for insight to operate effectively.
Many Theravada teachers today, particularly those in the Mahasi Sayadaw lineage, affirm that vipassana can lead to enlightenment without prior samatha development. Their interpretation emphasizes that the concentration naturally arising during careful mindfulness observation is adequate. However, they acknowledge that practicing samatha first often makes the vipassana path clearer and faster.
Both samatha and vipassana require mental stability to function. The difference lies in the mechanism. Samatha develops concentration by focusing on a single object repeatedly until the mind becomes unified and absorbed. Vipassana develops concentration as a byproduct of precise, sustained attention to changing phenomena—the concentration arises from the continuity of mindfulness itself, not from narrowing focus.
This distinction matters practically. Without adequate concentration, vipassana practice becomes scattered observation rather than clear seeing. The mind jumps between objects without penetrating their nature. Whether this concentration comes from prior samatha training or develops naturally during vipassana is the actual disagreement among traditions.
Some practitioners naturally develop strong concentration quickly and move effectively into vipassana. Others find their minds too scattered for vipassana to gain traction without samatha groundwork. The Buddha's teaching on right concentration (samma samadhi) in the Eightfold Path does not specify which meditation technique to use—this reflects his pragmatic approach to varying temperaments and capabilities.
Modern vipassana teachers like S.N. Goenka teach pure vipassana to thousands without preliminary samatha, reporting genuine insights and reported transformations. Simultaneously, other respected teachers recommend alternating between samatha and vipassana, or developing samatha first. Both approaches produce practitioners claiming enlightenment experiences.
Historical accounts include enlightened beings in various traditions who developed primarily through insight practice. The Thai Forest Tradition produced numerous accomplished meditators using minimal formal samatha. Conversely, the Zen tradition often employs samatha implicitly through zazen before insights arise.
The most honest assessment: enlightenment through vipassana alone is possible, supported by textual authority and contemporary examples, but developing samatha first provides practical advantages for most people. The Buddha offered this flexibility intentionally. Rather than a rigid requirement, samatha functions as a powerful tool that accelerates vipassana practice when the mental foundation needs strengthening.
The Pali Canon permits enlightenment through insight alone. The concentration developed during careful vipassana can suffice. However, samatha provides systematic training in the stability that vipassana requires to succeed. For practitioners whose minds are agitated or scattered, samatha offers a more direct route to the mental clarity that vipassana demands. For those with naturally calm minds or strong existing concentration, vipassana alone may prove adequate. The teaching suggests flexibility rather than dogma: develop the concentration your path requires, through whichever meditation method suits your temperament.