Which excerpt from "flowers for algenon" shows that charlie starts to view himself differently as he becomes smarter?

I'd hidden the picture of the old Charlie Gordon from myself because  now that I was intelligent it was something that had to be pushed out of my mind. But today in looking at that boy, for the first time I saw what I had been.  I was just like him!  Only a short time ago, I learned that people laughed at me. Now I can  see that unknowingly I joined with them in laughing at myself. That hurts  most of all.  I have often reread my progress reports and seen the illiteracy, the  childish naivete, the mind of low intelligence peering from a dark room,  through the keyhole, at the dazzling light outside. I see that even in my  dullness I knew that I was inferior, and that other people had something  I lacked - something denied me. In my mental blindness, I thought that it  was somehow connected with the ability to read and write, and I was  sure that if I could get those skills I would automatically have intelligence  too.