Any fool can talk. Even parrots talk. Talking is one thing, and realizing is another.
Philosophies, and doctrines, and arguments, and books, and theories, and religions, and sects, and all these things are good in their own way; but when that realization 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 realized truth do not require the ratiocinations of logic and all other gymnastics of the intellect to make them understand the truth.