To his admirers, he is a great teacher and a saint. To his devotees, he is a divine incarnation. Summing up the life of Sri Ramakrishna, Will Durant, in his The Story of Civilization, writes: "All religions are good, he taught his followers, 'All rivers flow to the ocean. Flow and let others flow too!' He tolerated sympathetically the polytheism of the people and accepted humbly the monism of the philosophers but in his own living faith God was a spirit incarnated in all men and the only true worship of God was the loving service of mankind."