When wood is fully burned, the fire will go out.
You must keep putting in new wood again and again.
Then the fire will not go out.
The same is true with the 'love [between you and] the Holy Son' too.
You must keep praying, conversing with the Holy Son, gain new things,
and love the Holy Son in a variety of ways.
Then the 'fire of the first love' will not go out.
