please check this one, teacher

I put down this paragrah listening to recoding of our class. this is what you modified my erorrs in sepaking. and I put words i can't understand exectly in brakets. sincerity is the (center) of my life (doctrine), i had (proven) that sincerity is really meaningful for me because of what i had experienced during my years of service in the army, for the first few month, they couldn't understand how sincere was this (my~~~)they even thought about me as an arrogant person, i also had trouble with one of my siniors, nonetheless i still showed my sincerity for them for this reason, as time went by, they realised how sincere i was with (my~~ from~~). I still hold on my personal principal which is being sincere anywhere, anytime.

Good morning! Nice composition! I admire your sincerity. Keep it up! Talk to you more about this in our class. Have a nice day!   I put down this paragrah listening to recoding of our class. >> I listened to the recording of our class. this is what you modified my erorrs in sepaking. >> You modified my errors in speaking.  and I put words i can't understand exectly in brakets.>> I can't understand the words that are in brackets.sincerity is the (center) of my life (doctrine), i had (proven) that sincerity is really meaningful for me because of what i had experienced during my years of service in the army, >>Sincerity is the center of my life. I had proven that sincerity is really important for me because of what i had experienced during my years of service in the army.  for the first few month, they couldn't understand how sincere was this (my~~~) >>For the first few months, they couldn't understand how sincere I was. they even thought about me as an arrogant person, >> They even thought that I am arrogant. i also had trouble with one of my siniors, >> I also had trouble with one of my seniors.  nonetheless i still showed my sincerity for them >>Nonetheless, I still showed my sincerity to them.  for this reason, as time went by, they realised how sincere i was with (my~~ from~~). >>As time went by, they realized how sincere I was.  I still hold on my personal principal which is being sincere anywhere, anytime. >> I still show that sincerity to everyone.