The Chandogya Upanishad is a Sanskrit text embedded in the Chandogya Brahmana of the Sama Veda of Hinduism. It is one of the oldest Upanishads. It lists as number 9 in the Muktika canon of 108 Upanishads.
The Chandogya Upanishad verses 1.1.1-1.1.9 (Sanskrit, Devanagari script)
The Chandogya Upanishad describes natural phenomena such as a thunderstorm as a form of chant.
Ahimsa - non-violence in action, words and thoughts - is considered the highest ethical value and virtue in Hinduism. The Chandogya Upanishad makes one of the earliest mentions of this ethical code in section 3.17. Above: non-violence sculpture by Carl Fredrik Reutersward.
The Chandogya Upanishad (7th chapter) discusses progressive meditation as a means to Self-knowledge.
The Samaveda, is the Veda of melodies and chants. It is an ancient Vedic Sanskrit text, and is one of the sacred scriptures in Hinduism. One of the four Vedas, it is a liturgical text which consists of 1,875 verses. All but 75 verses have been taken from the Rigveda. Three recensions of the Samaveda have survived, and variant manuscripts of the Veda have been found in various parts of India.
Image: 1636 CE Samaveda, Sadvimsha Brahmana, Varanasi Sanskrit college, Edward Cowell collection, sample iii, Sanskrit, Devanagari