以下是關於寫信的英語作文：
Dear Cathy,
I am writing to share my opinions on fashion with you. I recently heard that you were feeling depressed about not being able to afford the latest fashion trends. While it is important to look your best and keep up with trends, I believe that there are more important aspects of life than fashion.
A great deal of knowledge, a noble character, and a warm heart are qualities that will win others' respect and admiration. Personally, I believe that these qualities are far more valuable than any material possession, including fashionable clothes and accessories.
I hope that you will remember this saying and return to your happy, confident self.
Yours sincerely,
Jane