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."