Þjóðvitnir is, originally, the good guy who chants wisdom and power for elves and Æsir. 

But during kali-yuga (dark ages of ignorance), Þjóðvitnir starts his blooming business, using, exploiting, our ignorance, of which we do not perceive.

Goddess Eir is trying to persuade Þjóðvitnir to resume his noble role.

The book, skræða #4 “Óðsmál for bairns”, is a delight, as we succeed in getting Þjóðvitnir to reveal his business secrets.
You will really benefit from knowing.

Þjóðvitnir is all fun, mocks us and everything, above all our ignorance.

Þjóðvitnis business secret:
To his great annoyance, god Ullur burns up the seeds in “the vicious cycle” of action, the incentive of former actions, the unseen seeds colouring our next “not-so-new” idea:

Same Þjóðvitnir – and the vicious cycle on Youtube