Taittiriya Shiksha 1.11
सत्यं वद । धर्मं चर । स्वाध्यायान्मा प्रमदः
Satyaṁ vada, dharmaṁ cara, svādhyāyān mā pramadaḥ
Speak truth, walk dharma, do not neglect study.
Yajur Veda · Krishna Yajur Veda (Taittiriya shakha)
Taittiriya Upanishad
Taittirīyopaniṣad
Central theme: The five koshas; Brahman as Anandamaya
Mahavakya
आनन्दो ब्रह्मेति व्यजानात्
Ānando brahmeti vyajānāt
“He realised that bliss is Brahman.”
— Taittiriya Bhrigu 3.6
Three valli (chapters): Shiksha Valli (pronunciation, ethics — "satyam vada, dharmam chara"), Brahmananda Valli (the five sheaths: annamaya, pranamaya, manomaya, vijnanamaya, anandamaya — and the Brahmananda calculation), and Bhrigu Valli (the boy Bhrigu's progressive realisation that Brahman is matter, life, mind, knowledge, and finally bliss). The famous convocation address ("Satyam vada, dharmam chara, swadhyayan ma pramada") is from the Shiksha Valli.
Taittiriya Shiksha 1.11
सत्यं वद । धर्मं चर । स्वाध्यायान्मा प्रमदः
Satyaṁ vada, dharmaṁ cara, svādhyāyān mā pramadaḥ
Speak truth, walk dharma, do not neglect study.
Move inward through the koshas — bliss is the final layer and the only ground.