In the sestet from sonnet xix by john milton, how is the idea of service to god interpreted?

That murmur, soon replies, "God doth not need

Either man’s work or his own gifts; who best

Bear his mild yoke, they serve him best. His state

Is kingly. Thousands at his bidding speed

And post o’er land and ocean without rest:

They also serve who only stand and wait."

Rather than demanding work, God asks only for faith, devotion, or acceptance.