The Upanishads, Part 1 (SBE01): Khândogya Upanishad: VII, 17
The Upanishads, Part 1 (SBE01), by Max Müller, [1879]
1. 'When one understands the True, then one declares the True. One who does not understand it, does not declare the True 2. Only he who understands it, declares the True. This understanding, however, we must desire to understand.'
'Sir, I desire to understand it.'