The Upanishads, Part 1 (SBE01), by Max Müller, , at sacred-texts.com
1. 'Fire (tegas) is better than water. For fire united with air, warms the ether. Then people say, It is hot, it burns, it will rain. Thus does fire, after showing this sign (itself) first, create water. And
thus again thunderclaps come with lightnings, flashing upwards and across the sky. Then people say, There is lightning and thunder, it will rain. Then also does fire, after showing this sign first, create water. Meditate on fire.
2. 'He who meditates on fire as Brahman, obtains, resplendent himself, resplendent worlds, full of light and free of darkness; he is, as it were, lord and master as far as fire reaches--he who meditates on fire as Brahman.'
'Sir, is there something better than fire?'
'Yes, there is something better than fire.'
'Sir, tell it me.'