The Skeptic is one who demands evidence. All the Skeptic demands is that which the Theist can never supply. For the only thing which the Skeptic demands of anything or anybody regarding any conclusion is evidence. The Skeptic neither requires nor is impressed by stories and tales of fantastic deeds of an alleged deity in a land far, far away at a time long, long ago. Nor for that matter is the Skeptic concerned with promises or threats of an existence in the afterlife which supposedly offers eternal bliss for some and barbaric torture for others. Again, the Skeptic is one who merely demands evidence, and such is that which the Theist simply cannot supply.
Yet I cannot fault the Theist for lack of effort, either with regards to attempts to persuade we Skeptics or with regards to the effort required for the Theist to maintain their philosophy. In fact, I openly admit that Skepticism lacks the effort which Theism most definitely does require. For Theism; by its very nature, demands extensive and unceasing effort in order to exist as an accepted philosophy. Indeed Theism requires that one study in order to learn what to believe, then further requires that the Theist continually indoctrinate themselves in further study so as to not stop believing, and then even requires the regular and cyclical exercise of traditional practices as a means of ongoing indoctrination. The fact is that the mental effort of constantly praying and praising, and the hectic schedule of continuous weekly worship assemblies (which involve further indoctrination) allows the Theist little time to reason and think beyond what they are told to believe and do. Again, Skepticism truly lacks the effort which Theism most definitely does require.
And so I repeat myself by way of conclusion:
The only thing which the Skeptic demands of anything or anybody regarding any conclusion is evidence. And evidence is the one necessary element that the Theist merely cannot supply.