SGI President Daisaku Ikeda further interprets this jewel as the Buddha's great desire for all people to be happy, a desire that is fundamentally inherent in all life. In this sense, the poor man awakening from his drunken, forgetful state to finally see the jewel he possesses represents the transformation that takes place in the hearts of the 500 disciples as they begin to perceive within and manifest the expansive, all-embracing life condition of Buddhahood. They change from people narrow-mindedly seeking their own happiness and salvation to people devoted to helping others become happy. They awaken, in other words, to the "great vow to unfailingly lead others to happiness."Elevating our lives to this great vow or wish of the Buddha is synonymous with unlocking our true potential, finding fulfillment in life and attaining Buddhahood. When we embrace this vow, states President Ikeda, "everything, every situation, takes on value for our lives. Nothing around us is without meaning; no effort is wasted." The practice of Nichiren Buddhism awakens that aspiration. We are able to live with a broader sense of self and purpose. Our struggles and problems then become opportunities to break through our self-imposed limitations and encourage and ignite hope in those facing similar challenges.
https://lse.sg/the-lotus-sutra/7-parables/the-jewel-in-the-robe/