It would hurt me to know that you could laugh at my honest admiration.

You won't laugh, will you?
I am sure you will value this letter for its honesty rather than for its literary quality.

I have often wondered what you were like.

But after all, that can not matter, since you are good and kind and wise; for you can not be else, and write the lofty things you do.
Warrington put the letter away, placed it carefully among the few things he held of value.

It would not be true to say that it left him unaffected.