The problem is with the words, sentences, and the language we speak. Actually, it has constraints; it has limitations. And the enlightened people have something which is beyond the mind. That’s why Gautama Buddha became silent, and his way of communication most of the time was only with "silence," with thoughtlessness.

The problem with words, with the sentences, is that, you can prove or disprove them in anyway – because everything in this earth plane exists in duality. And the things which are beyond the mind are non-dual. So the enlightened people might feel uncomfortable that how to express things in words which is beyond the mind.