'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.

In plain words: The teacher Sanatkumara tells his student Narada that fire, meaning heat and light, is greater than water, because fire makes rain. People feel the heat or see lightning and say, "It will rain." So he says to meditate on fire.