People like Jim Jones, David Koresh, and Marshall Applewaite have been able to control the emotions and feelings of people in extreme and destructive ways. It is important to know why we believe what we believe. Many of us have accepted what our parents told us. The result is that when our faith is tested in any way, it crumbles. When people who claim to be Christians make monsterous errors, a lack of belief is at least partially at the root of their collapse.
Life brings a lot of disappointment, failure, and disillusionment.
If we are not solid in our faith it is easy to be shaken so badly that we compromise what we believe or reject God all together. The Bible contains strong support for rational building of faith through evidence. A study of Thomas in John 11 compared to John 20 will show a man moving from total belief and a willingness to die for his faith, to rejection. In the ministry of Paul we see him offering apologetic evidences in his dealings with the skeptics of his day- in all cases suited to the faith needs of the audience that he was addressing. It is not the purpose of his discussion to suggest that there is to be no emotion in our religious expression or belief.