It's so so hard to understand yourself.
Let alone put that into words.
Let alone say them out loud to someone.
Let alone have them understand what you've said.
How can they? They're not you!
They'll never understand what you've said in the same way as you do.
As your words make their way through the other persons layers of understanding, you lose control of the meaning. You never had control in the first place.
What's fascinating is realising that the other person can understand you in a way that you aren't capable of.
That's why it's worth trying to be understood and why it's worth listening to their response.
Together, you can create something better.