"It is one of the most practical things in Vedantic morality, for it is the teaching of the Vedanta that you are all prophets, and all must be prophets. The book is not the proof of your conduct, but you are the proof of the book. How do you know that a book teaches truth? Because you are truth and feel it. That is what the Vedanta says. What is the proof of the Christs and Buddhas of the world? That you and I feel like them. That is how you and I understand that they were true. Our prophet-soul is the proof of their prophet-soul. Your godhead is the proof of God Himself. If you are not a prophet, there never has been anything true of God. If you are not God, there never was any God, and never will be. This, says the Vedanta, is the ideal to follow. Every one of us will have to become a prophet, and you are that already. Only know it. Never think there is anything impossible for the soul. It is the greatest heresy to think so. If there is sin, this is the only sin - to say that you are weak, or others are weak."

- Swami Vivekananda, "Practical Vedanta, Part I" (November 10, 1896, Morning class at 39 Victoria St, London), Complete Works: Vol 2