In D.H. Lawrence's "The Rainbow," the quote reflects the enduring spirit of aspiration and personal freedom. The kite symbolizes one's dreams and ambitions, which continue to ascend as long as one is willing to invest in them, represented by the string. This suggests that an individual's potential is boundless, limited only by their willingness to pursue it.

Furthermore, the idea that the kite's flight brings joy regardless of others' negativity emphasizes the importance of self-fulfillment. Despite external criticism or hostility, the personal achievement and satisfaction derived from following one's path remains invaluable. This duality captures the essence of resilience and the power of personal growth amidst societal challenges.