In debate, 'the burden of proof'; the burden 'to do the work', is placed on the affirmative claims. -http://www.nizkor.org/features/fallacies/burden-of-proof.html
Since I did not claim to have seen pain nor that I can describe faith, I have nothing to prove.
Reasoning is the method - logic the tool to scrutinize the method
And therein lies the beauty of logic; it deals with demonstrable facts, as a set of interconnected axioms created by sentient beings - meant to tell us incontrovertibly when an argument 'works' - by showing unassailably when the argument; a piece of reasoning, indisputable supports what is meant to be a definite proposition : the conclusion offered representing what is deemed fact(ual).
What matters in the end is whether the reasoning is sound; justifying the premises, and whether the argument form is valid; proper inference - so that when an argument is deductive, valid and sound, its conclusion is true - no matter the intrinsic nature, or value, of the conclusion.