Battling with Atheists

WOW! I am spirtually worn out! This morning God put up against some Atheist. Have ever encountered some and had a conversation about faith? Well here is what happened. One of my friends asked me if I could tutor him during 1st period Study Hall. I am like okay. When I was ready, I went over to him and saw that he had an Atheist book that a friend of his reccomened for him. Oh by the way, this student is a Freshmen and the person that influenced him is a Junior. I asked him what is that book? He said what I thought it was. Well, his other friend who is a freshmen is really good friends with the guy who is a Junior and an Atheist. Well, I could not just stand there and let him read that horrible book. I started telling him why that book is wrong. Then we got into the discusion (and I don't know how) about why did God have the Israelites take over the Promise Land by kicking them off of their land. Well that went down hill. Then the Atheist came over and took full advantaged and joined the arguement. I could tell that my friend Tad, is in alot of trouble spiritually. He has allowed a Junior to twist his thoughts about Christ and he is trying to convert him to Atheisum. I could tell that he is very confused. We go on the topic about morall vaules and pre-marriage sex. I said, " How would you feel if your wife slept with someone and you saved your virginity for her" He kept trying to cover up the question by changing the question. But he finally answered the question he said it to please the Atheists. Then I asked the Holy Spirit to give the right words to say and then I asked my friend Tad, to step aside and let me talk to him in private. I told him how much I cared about him and his relationship with God. He told that is very confused and does not know what to do. He told me that he went to a catholic Priest and asked him some question, but he did not help besides basicly you are going to Hell if you fix yourself. During this whole time while I was trying to talk with him, Satan knew that God was using me and was trying to help him, so the Atheists comes over and starts saying things like read the Bible and make the inteligent decission. So I invited Tad (freshmen) to go to Youth group with me. But he said I don't know. The Atheist told me to read a book about some atheist and get informed. I do not want to read it because honestly I do not want to hear what they have to say and will make me even dougbt God even more. I told him it would be a waist of my time and it would not convert me. But at the same time I was trying to protect myself. I told the Atheists he should come to Youth group and talk to pastor marc. Of course he refused. I even told Tad the same thing and he was doubtfull So then the bell rung and he had to leave. During the whole morning I had these thoughts from the Atheists and was proccesing the info. I began unfortunatly to doubt Christ. I feel really horrible about this. I then went to the bathroom not to go, but to pray. I prayed and asked for strength and guidance. He reminded me some of the amazing miracles that have happened in my life. After school, I ran into Tad and asked how he was doing, of course he said yes. He told he was going to spend the afternoon with Matt ( Atheist). Later on , Tad's friend Adam ran into and told that he heard that something happened. I told him everything. He said that ever since they have started High School together Tad has changed his moralls. He said that he went through Grade school together and he was very religious. So what I am trying to say that, PLEASE PRAY FOR THE FOLLOWING:
TAD (freshmen)
Joey ( freshmen)
Matt (junior, and the Atheist)
Finaly for me. I need strength to not doubt and the words to say to them when I encounter them.