Upanishads

(Sri Aurobindo:) “The Upanishads came after the Vedas and they put in more plain language the same truth that was in the Veda. In the Veda it is in symbolic language. But the Upanishads, of course, are equally great.”

(Sri Aurobindo:) “They are a great store of observations and spiritual experiences with conclusions and generalisations from those observations and experiences, set down without any thought of controversial caution or any anxiety to avoid logical contradictions. Yet they have the consistency of all truthful observation and honest experience; they arrange themselves naturally and without set purpose under one grand universal truth developed into a certain number of wide general laws within whose general agreement there is room for infinite particular variations and even anomalies. They have in other words a scientific rather than a logical consistency.”

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See also

• Isha Upanishad
• Kena and Other Upanishads
• Veda
• The Bhagavad Gita