What I mean by I'm intelligent enough to know:
-that storms are not from the Gods
- that I don't talk to anyone but myself, I don't imagine voices of Jesus or delusions.
- that illness or death is from god.
- that I do not believe in the devil, but I think evil exists.
- and I don't believe everything that happens is for a master grand plan.
- and I don't believe in heaven or hell.
- etc.
- Most know storms are not sent by God(s).
- If someone feels God speaks (inspires) them, they are delusional. Not a chance you are not listening/hearing. (Listening in the figurative sense)
- Most know illness/death have a physical cause
- Most agree evil exists
You are not so very different from everyone else. As far as a Master Plan: Over the eons, do you see growth in mankind? Or, are we the same as we have always been.
The better question is not over a belief in heaven/hell but whether one believes in the afterlife. For example, I have a friend who believes that spirits, just like water, rise, mix together, and then return (probably in many different forms) to life on earth. Unlike reincarnation, this is not the entire spirit returning as a cockroach, for example, but that like water in a cloud it mixes and part might return as a snowflake, sleet, hail, etc, while another part returns as rain or mist. In other words, an entirely different spirit as it combines with other spirits.
None of this supports reasoning that people make things up in order to make themselves behave. I have found people do as they want. Some want to behave and some do not. Either group can sometimes be convinced to misbehave or to behave when normally their choice might be different.