SB 4.8.38

Dhruva Mahārāja, although a young child, expressed his hope that he might be offered the benediction of a kingdom which would exceed in opulence those of his father and grandfather. He also expressed his gladness that he had met such an exalted person as Nārada, whose only concern was to illuminate the world, like the sun, which rotates all over the universe only for the purpose of benefiting the inhabitants of all planets. Nārada Muni travels all over the universe for the sole purpose of performing the best welfare activity for the entire universe by teaching everyone how to become a devotee of the Supreme Personality of Godhead. Thus Dhruva Mahārāja felt fully assured that Nārada Muni could fulfill his desire, even though the desire was very extraordinary.

The example of the sun is very significant. The sun is so kind that he distributes his sunshine everywhere, without consideration. Dhruva Mahārāja requested Nārada Muni to be merciful to him. He pointed out that Nārada travels all over the universe just for the purpose of doing good to all conditioned souls. He requested that Nārada Muni show his mercy by awarding him the benefit of his particular desire. Dhruva Mahārāja was strongly determined to fulfill his desire, and it was for that purpose that he had left his home and palace.