I have written an English rap song which defines me.

This time I have tried my best to make perfect song.

Have you ever seen a man whose heart beats only for the people? 
Sure you haven't; then again, you don't know who I am and for what I've been known for.
My heart is like a sea and it's water is my love; it's not going to be less for anyone who wants it. Ask me for help then. I will be always there even if I have to walk on a volcano.
I don't want your thanks for the help I've done; just be good-hearted men to serve your nation. You will never know how I grew up far from selfishness; far from greediness.
Thank you, mom, for making me a man who is only alive to help others.
Oohh God, but I doubt all people in this beautiful world - are they really made by you?
Why are my eyes still open to see such mother fuckers who even kill their moms for money, and rap sisters .
Who is there to help an old woman to cross a road.
Why don't we want to live happily without fighting?

Remember when writing music, the grammar is often wrong and can seem backwards (similar with poetry). You have done a good job, I like it, but to recieve an honest yay or nay, it would be best to post a video of you rapping this (with the lyrics) :)

I have written an English rap song which defines me.

This time I have tried hard to make the perfect song.

Have you ever seen a man whose heart beats only for the people?
Sure you haven't; then you don't know who I am and what I've been known for.
My heart is like a sea and its water is my love; is not going to be less for anyone who wants it. Ask me for help then. I will be always there even if I have to walk on a volcano.
I don't want your thanks for the help I've done; just be good-hearted men and serve your nation. You will never know how I grew up far from selfishness; far from greediness.
Thank you, mom, for making me a man who is only alive to help others.
Oohh God, but I doubt all people in this beautiful world - are they really made by you?
Why are my eyes still open to see such mother fuckers who even kill their moms for money, and rap sisters?
Who is there to help an old woman to cross a road? 
Why don't we want to live happily without fighting?