What it is
Nonduality names a family of contemplative traditions that question the split between subject and object. Advaita Vedanta, several schools of Buddhism and Zen approach it through practice rather than argument: look closely at experience and see whether a separate self is actually found.
It is a claim about how experience is structured, not a scientific finding. This site presents it as a tradition to understand and test in attention, not as established fact.
Seer, seeing, seen
The three-part structure of experience that nondual traditions question.
Source: Internet Encyclopedia of Philosophy
A diagram of ideas, not a measurement.
Ideas to carry
- 1
Not two
Advaita means “not two”: the claim that self and world are not ultimately separate.
- 2
Look for the looker
Many practices ask you to find the one who is seeing, and to notice what you actually find.
- 3
Practice over belief
These traditions tend to say: do not believe it, test it in attention.
Established What we know
Interpretation The older lens · Upanishads
The Chandogya Upanishad’s “tat tvam asi”, you are that, compresses nonduality into three words.
Reading
- c. 8th–6th century BCETat tvam asiChandogya Upanishad
- early 1900sWho Am I?Ramana Maharshi
- 1966The BookAlan Watts
Me: where is the self?
The self, looking for itself: 👀
Connected subjects, projects and writing
- PerceptionSubject · Origin
Interpretation Science models a perceiver and a world; nondual traditions question the split itself.
- ConsciousnessSubject · Origin
What it is like to be you: the fact of experience, and why science still has no settled account of it.
- IdentitySubject · Origin
The memories, habits, roles and languages that make a person, and what keeps them the same over time.
- Questions beneath the surfaceEssay · Origin
Why I read across philosophy, consciousness and religious traditions, and the rules I hold myself to when writing about them.
Sources
- Vedanta, Advaita Internet Encyclopedia of Philosophy. Checked 5 Nov 2026.
- Japanese Zen Buddhist Philosophy Stanford Encyclopedia of Philosophy. Checked 5 Nov 2026.