Dear Dad, School is really great. I ...

Dear Dad,
School is really great. I am making lots of friends and studying very hard. With all my stuff, I simply can`t think of anything I need. so if you would like, you can just send me a card, as I would love to hear from you.
Love,
Your son

The Reply:

Dear Son,

I know that astronomy, economics, and oceanography are enough to keep even an honor student busy. Do not forget that the pursuit of knowledge is a noble task, and you can never study enough.
Love,
Dad