If you know what you want to say but you can’t find the words yet, write without thinking about the words.
Write while thinking about the feeling.
Allow yourself to feel it first.
Feel it fully, then write the words.
Feel it fully, let stream-of-consciousness words come out..
Feel it fully, then start sculpting away.
Keep feeling it, and keep writing about it. Every day. Because sooner or later, feeling the words words will reveal what you want to say.