To speak is to risk being misunderstood.
Please allow me to quote heavily from The Bard Terence McKenna—this selection comes from a discussion about language:
We use rapidly modulated small mouth noises. As primates we have incredible ability to make small mouth noises. We can do this for up to six hours at a stretch without tiring. No other thing we can do approaches the level of variation with low energy investment that the small mouth noises do. A person using a deaf-and-dumb language is exhausted after forty-five minutes.
But a problem with the small mouth noises mode of communication is: I have a thought, I look in a dictionary that I have created out of my life experience, I map the thought onto the dictionary, I make the requisite small mouth noises, they cross physical space, they enter your ear, you look in your dictionary, which is different from my dictionary, but if we speak what we call ‘the same language’ it will be close enough that you will ‘sort of’ understand what I mean. Now if I don’t say to you, ‘what do I mean?’ you and I will go gaily off in the assumption that we understand each other.
I stand behind my words.
What do I mean?