The Upanishads, Part 1 (SBE01): Khândogya Upanishad: VII, 20
The Upanishads, Part 1 (SBE01), by Max Müller, [1879]
1. 'When one attends on a tutor (spiritual guide), then one believes. One who does not attend on a tutor, does not believe. Only he who attends, believes. This attention on a tutor, however, we must desire to understand.'
'Sir, I desire to understand it.'