Am I ever glad I have read this! A lot of things are beginning to make sense.
The ISFP I know's sentences are often reduced to :
"That's good, then."
(Sums up the last phone conversation I had with her. She sounds a lot like Stepho from what I've heard on her video. Same sweet, shy hesitation.)
But she once sent me a letter she wrote at a time when she was quite depressed and probably in some sort of NT shadow function. Splendid letter with english words I had never read in my life. I still have it. From what I have read that she wrote with care, she can be quite poetic.
This is me to a T. I'm starting to think I might be ISFP without all the benefits of being an S.
There is just such a drastic contrast between my verbal and written communication. It is extremely disconcerting to me. I sound like an imbecile when I can even manage to make words come out at all, but I've been told by many people my writing is eloquent.
"If you would convince a man that he does wrong, do right. But do not care to convince him. Men will believe what they see. Let them see."