Prasthanatrayi acknowledge as its three authoritative primary sources. The texts comprising the Prasthanatrayi are the Upanishads, the Bhagavadgita and the Brahma Sutra.

1. Prasthantrayi
Brief introduction

2. Prasthanatrayi
Prasthan- To go
Trayi- Three
Refers to the three
recognized texts of religion
having epistemic authority.

3. Upanishad
The known as Upadesha
prasthana
and
Śruti prasthāna especially
the Principal Upanishads.

4. Srimadbhagwad
Gita
known as
Sadhana prasthana (practical
text),
or
Smriti prasthāna

5. BrahmaSutra
Sutra prasthana
or
Nyaya prasthana
or
Yukti prasthana
(logical text or axiom of logic)

6. Upanishads
According to Muktopnishad- there are total 108
Upanishads.
Some scholars list ten as principal Upanishads, i.e., also
known as Mukhya Upanishads
Īśā, Kena, Kaṭha, Praṣna, Muṇḍaka, Māṇḍūkya, Taittirīya,
Aitareya, Chāndogya and Bṛhadāraṇyaka
Aadi Sankaracharya ji wrote Bhasya on Shweta Shwetar
Upanishad also and i.e. why Some scholar also count this
as Mukhya Upanishad.
Therefore some scholar believe 11 number as Mukhya
Upanishad.

7. Etymology
The Sanskrit term Upaniṣad comes from
Upa- "by" and
Ni-ṣad "sit down“
to "sitting down near",
Refers to the student sitting down near the
teacher while receiving true
knowledge.(Gurumukh)
Revealing the knowledge to eliminate the
ignorance

8. RelationofVeda
withUpanishad
S.No Chapter Name Sutra Number
1. Rigved Aitreya
2. Saamveda Chandogya
Kena
3. KrishnaYajurveda Katha
Taitiriya
4. ShuklaYajurveda Isha
BrihadAranyak
5. Atharva Veda Mundaka
Mandukya
Prashn

9. SrimadBhagwad
Gita
▪ The Bhagavad Gītā is part of the Mahabhārata,
described in Bheeshma Parva.
▪ Narrative framework of a dialogue between prince
Arjuna and his and Sri Krishna
▪ Arjuna has moral dilemma and misery due to the
violence the battle against his own relatives
▪ Krishna counsels Arjuna to "fulfill his duties as kshatriya
to maintain the Dharma" through "selfless action“ or
“KarmaYoga”
▪ The setting of the Gita in a battlefield can be
interpreted as the ethical and moral struggles of the
human life

10. BrahmaSūtras
▪ Also known as the Vedānta Sūtras
▪ Systematize the doctrines taught in the Upanishads and
the Gītā.
▪ Also known as Vedanta Sutra
▪ (Sanskrit: वेदान्त सूत्र), which literally means the "final aim
of the Vedas
▪ The Brahma Sūtras is a Sanskrit text, written by the sage
Badarayana or Known as sage Vyasa.
▪ The Brahma Sūtras consists of 555 aphoristic sutras in
four chapters.

11. Structure
▪The Brahma Sūtras consists
555 sūtras in four chapters
(adhyāya)
▪Each adhyay is divided into
four parts known as pāda.
▪Each part is further divided
into subparts called
Adhikaraņas

12. SummaryOf
Chapter
S.No Chapter Name Sutra
Number
1. Samnavaya Adhyay 134
2. Avirodhya Adhyay 157
3. Sadhana Adhyay 186
4. Phala Adhyay 78