Dear John,

How nice I hear from you and thanks for your reply.
Sorry for my sticking about my request. My BS is in
communication engineering. So I have taken Field and
Wave Electromagnetics, and Microwave Engineering and
the mathematics necessary for it.
My MS thesis was Realism and Quantum Mechanics and I
had to self-study introductory quantum mechanics. I
have read books such as Davies's Quantum Mechanics,
Gasiorowicz's Quantum Physics, and Some chapters of
Sakurai's Modern Quantum Mechanics, though the last
was difficult for me to understand, and I must confess
that my skill in problem solving is not so good as a
physics student; to tell the truth, I think, I am
ashamed to tell it, is not good at all.
I hope this sketch of my scientific knowledge is not
too discouraging and there is a way for a person, by
such a little background knowledge, to continue his
intersted studies by self study. At last I hope the
best for you, and thank you again and sorry
for taking your time.
AnonymousDear John,

How nice I hear from you and thanks for your reply.
Sorry for my sticking about my request. My BS is in
communication engineering. So I have taken Field and
Wave Electromagnetics, and Microwave Engineering and
the mathematics necessary for it.

My MS thesis was Realism and Quantum Mechanics and I
had to self-study introductory quantum mechanics. I
have read books such as Davies's Quantum Mechanics,
Gasiorowicz's Quantum Physics, and Some chapters of
Sakurai's Modern Quantum Mechanics, though the last
was difficult for me to understand, and I must confess
that my skill in problem solving is not so good as a
physics student; to tell the truth, I think, I am
ashamed to tell it, is not good at all.

I hope this sketch of my scientific knowledge is not
too discouraging and there is a way for a person, by
such a little background knowledge, to continue his
intersted studies by self study. At last I hope the
best for you, and thank you again and sorry
for taking your time.

Paragraphs are very helpful. One giant block of text is hard to read.

I have hightlighed what I consider to be problem areas. Some are grammar issues, some content.

The biggest problem is that you are not clear what you want this person to do. Make suggestions about how to continue your studies? Recommend you for a place at a university? You don't ask him for anything.

Second, your tone is very negative - you are telling him you are not good enough. Don't do that - emphasize the positive and how much you have been able to learn on your own.

Good luck with whatever it is you are trying to achieve.

thanks for your comments; but what can I write instead of 'Sorry for my sticking about my request' and ' So'?