Lesson 10- Our Search for Truth. Help

I have a dilemma. I am to teach elders quorum this coming Sunday. The lesson is lesson 10, Our Search for Truth. The problem is I don’t feel comfortable giving the old company line about prayer and feeling the Holy Ghost. I have had personal experience where I have seen that the feelings of the Holy Ghost are not infallible. Meaning a person does not come to know the truth threw the feelings of what they think is a Ghost. I cant say what I just said in class with out having the room of TBM’s going ballistic.

Does any one know of some good stories, quotes or antidotes to express how one comes to the truth threw rational thinking and observation? How do I convey to the class how to have critical thinking skills while learning? I want to encourage them to shed off their bias opinions and view things from a logical point of view with out throwing me out.

The group of people I’ll be teaching are very defensive when discussing any thing that is out side their current belief system. Or should I just cower and read from the manual as printed?

Thank you for your help.