The highest men (humans) are calm, silent, and unknown. They are the men who really know the power of thought; they are sure that, even if they go into a cave and close the door and simply think five true thoughts and then pass away, these five thoughts of theirs will live through eternity. Indeed such thoughts will penetrate through the mountains, cross the oceans, and travel through the world. They will enter deep into human hearts and brains and raise up men and women who will give them practical expression in the workings of human life. 

- SWAMI VIVEKANANDA