If what God actually wanted from us was to be worshipped, believed in, and obeyed in one particular way, think how easy it would be for Him to inform everyone on Earth of what He wanted.
Even if He only spoke to a few prophets, why not just have a bunch of them say the same thing at the same time in different languages?
Instead, what we’ve got now is a God who apparently expects to be believed in on a basis of occasional hearsay and conflicting testimony… which means that to arrive at correct faith depends on the exact same faculties that other people use to arrive at a wrong belief in a false deity.
Supersonic Man 