My Mathematics Teacher

I'm afraid of my mathematics teacher at first
He is an old man who looks almost fifty-five years old with a serious face. He is prestigious in my school. During the first semester of his class, I was hit by him almost 5 times. It's a bad dream of my junior high school's life.

I'm good at Math and love it so much. I had confidence in Math at the beginning of junior high school, but he warned me:"Maybe you are proud of planting a flag at the top of a small hill, But this is because you have never been to a tower mountain." I was not convinced by him. I still believed I can do well in Math so I must prove to him that I can also plant a flag on a mountain, on a Himalayan Mountain! I did it, I got #1 in final exam. At the Awards ceremony of Good Student, my teacher awarded the prize to me and said:"Next time, you should plant flag on the moon."
I did't hate him anymore even if he hit me, he shoutted to me, or he criticized me. I couldn't got such power to learn Math without him. I appreciate him so much that I can never forget.
When I got to high school, I missed junior school's life, my teacher, my classmates, my desk, my chair, especially my Mathematics teacher.
One day, I went back to junior school with my classmate after I had been away from junior school one year. I couldn't believe my eyes! He got older so much.just like a 65-years-old man.I felt blue. My mathematic teacher works so hard. His red eyes, his deep wrinkles, his polished white hair broke my heart. The only thing that didn't change was his serious face.I embraced him.Maybe because of meeting him everyday when he taught me, I didn't notice his getting old. Now I have been away from him for one year, so I realize it.
"Why do you work so hard,sir? You looks getting ten years older, just like a man who is sixty-five." I told to the teacher.
He stared at me for a while, and then laughed. "I'm just fifty-five now, boy!"
I swallowed, swallowed the tear getting out into my heart. I found the tear be acidic, I felt my heart is soaking in a lemonade. I felt so sad!
I didn't cry. I laughed. I wanted to prove that I'm perfect, from past to present. How can I cry?
I said good-bye to the teacher and left out school. It's dark outside. I walked on the path to my home. The orange light from the street lamp covered ground. It's eternal and powerful, illuminating the path I walk on, the direction I walk to.