Here is a letter that Aaron sent to our Bishop.  It was hand written, but I typed it here to share with you:

I would like to say how grateful I am to all of those that have supported me and made it possible that I can be here on my mission.  I hope that I have done well to live up to your sacrifices.  This time the Lord has given me to teach others His gospel has been very special.  I would have to say that it is not the easiest thing, but it's very fulfilling.  I think I somewhat take for granted the Gospel at times in my life, but being here in Peru has helped me realize how grateful I am to be a member of the Church and to know that Jesus Christ is my Savior.  In the Doctrine and Covenants Joseph Smith said that after all the testimonies that could be given, the most important would be a testimony of the Savior.  I feel the same.  Of the things that I have been able to experience, the most powerful has been to be able to witness the atonement take effect in the lives of people.  I personally at times have forgotten the importance of repentance in my life, but I'm thankful that I have a personal testimony of the Savior. Probably the most powerful experience I have had so far on my mission would be seeing one of my investigators take the step of repentance seriously in her life. When we were teaching Martha and her daughter, Pilar; Martha was pretty doubtful at times, but kept the commitments.  She wanted us to focus more on teaching her daughter.  Pilar got her answer first and was very excited to be baptized.  She even told her mom that to get her answers she would have to keep praying.  I remember when we taught the 3rd lesson, that was the turning point for her mom.  We taught her of repentance and left some scriptures for her to read in the Book of Mormon.  A couple of days later we passed by.  She told us that she had read and her attitude was very different.  She asked me about the importance of repentance and that for her it was very important.  I shared with her my testimony and promised her that if she would pray to be forgiven of her sins and be baptized that she would be clean.  She promised us that she would.  The day of her baptism was very special to me.  After they were baptized, I was able to listen to Pilar bear testimony of the Book of Mormon and prayer.  It was very powerful.  Then when Martha stood to share her testimony she looked out at everyone for a moment, started to cry and said, "I feel happy."  A very simple testimony like hers made me feel the Spirit stronger than ever before in my life.  Her testimony changed the focus of my mission.  I am so thankful to know that the Church is true, that the Book of Mormon is the Word of God and that Jesus Christ was willing to die for our sins.  I know that He is the Savior and that His Sacrifice, if we apply to our lives can make us happy.  Again, I am very thankful for the support that has been given to me.  The time I have left in the mission is very short, but I hope that I can help more people receive the happiness in their lives that can only come from the gospel.   Love, Elder Barrett