"Most of you are so young you don't know who I am, and that's good"

This quote by Jim Bakker is most likely referring to his age and the fact that he is much older than the people he is talking to. He is most likely suggesting that it is a good idea that the majority of individuals he is speaking to are too young to know who he is, as it suggests they have not been exposed to the controversies and scandals that have actually surrounded him throughout his life. He may also be implying that it is a good thing that the more youthful generation is not knowledgeable about his past, as it enables them to form their own viewpoint of him without being influenced by the unfavorable press he has received. By stating that it is a good thing that they don't understand who he is, he is likely attempting to reveal that he is not specified by his past which he is still a person worthy of respect.