Let a Brâhmana, after he has examined all these worlds which are gained by works, acquire freedom from all desires. Nothing that is eternal (not made) can be gained by what is not eternal (made). Let him, in order to understand this, take fuel in his hand and approach a Guru who is learned and dwells entirely in Brahman.

In plain words: A seeker should look carefully at everything that can be earned by actions and see that none of it lasts. Then he should let go of all wanting, because something eternal cannot be earned by actions that come and go. To learn the truth, he should carry firewood as a humble gift and go to a teacher who is learned and lives fully in Brahman.