Talking is one thing, and realising is another. Philosophies, and doctrines, and arguments, and books, and theories, and churches, and sects, and all these things are good in their own way; but when that realisation comes, these things drop away. For instance, maps are good, but when you see the country itself, and look again at the maps, what a great difference you find! So those that have realised truth do not require the ratiocinations of logic and all other gymnastics of the intellect to make them understand the truth; it is to them the life of their lives, concretised, made more than tangible. It is, as the sages of the Vedanta say, "even as a fruit in your hand"; you can stand up and say, it is here. So those that have realised the truth will stand up and say, "Here is the Self". You may argue with them by the year, but they will smile at you; they will regard it all as child's prattle; they will let the child prattle on. They have realised the truth and are full. Suppose you have seen a country, and another man comes to you and tries to argue with you that that country never existed, he may go on arguing indefinitely, but your only attitude of mind towards him must be to hold that the man is fit for a lunatic asylum.