Self-realization is the ultimate goal of human birth. Manavjanma, Mumukshatva and Mahapurusha Sangatya are rare for these three to happen simultaneously. Any person who gets these three at the same time can become Mahatma in the long run. Such incarnated men are Sri Ramakrishna Paramahamsa and those great men are the ascetic disciples of Sri Ramakrishna. Fifteen of Sri Ramakrishna's in this book called Coexistence with God