There is an argument from uncertainty that concludes that agnosticism is the best option. It goes like this:
Is there a way to refute this argument, also in favor of theism?
The more important it is to be right about a matter, the more cautious we should be in forming our beliefs. If a matter is of great importance, as religion is, then our evidential standards concerning it should be set high, we should demand strong evidence before settling on what we believe.
In fact, religion is of unquantifiable importance—there is nothing more important than being right about the question of God’s existence—and we should therefore set our evidential standards infinitely high.
If this is correct, then the standard of evidence required for justified religious belief is so high that it can never be satisfied; we can never have enough evidence to form beliefs about such questions as whether God exists. In this way, the importance of religion works to suggest that we can never have religious knowledge, that we ought to remain agnostic.
http://www.philosophyofreligion.info/arguments-for-agnosticism/the-argument-from-uncertainty/
Is there a way to refute this argument, also in favor of theism?