"India's spirituality is India's strength. But unfortunately some people link spirituality with religion," Prime Minister Narendra Modi said on Tuesday."The two are very different," he said after releasing a commemorative stamp on the centenary celebrations of the Yogoda Satsanga Society (YSS) of India.The YSS was founded 100 years ago with its headquarters in Ranchi by Paramahansa Yogananda to spread the message of Indian spirituality in foreign shores. Yogananda, who lived in the US from 1920 until his death in 1952, authored the "Autobiography of a Yogi", a spiritual classic that is credited with helping millions around the world to embrace spirituality.The Prime Minister lamented that some people linked spirituality with religion. Describing yoga as the entry point to spirituality, Modi called upon the people to make it part of their life. "Once an individual develops an interest in yoga and starts diligently practising it, it will always remain a part of his or her life," he added.