What potential factors could explain why a truth-seeking skeptic might fail to undergo a conversion experience?

I posted a question on Philosophy Stack Exchange titled [*Is the Skeptic's Prayer a legitimate scientific experiment?*](https://philosophy.stackexchange.com/q/108053/66156) . Please review it for contextual information. Numerous responses, predominantly from non-believers and skeptics, present various objections to the scientific validity of the *Skeptic's Prayer*. However, let's consider a scenario where a skeptic, intrigued by the possibility of God's existence and the truth of Christianity, decides to earnestly give it a try. This individual prays with the hopeful expectation of a divine response, but despite genuine effort, experiences no discernible outcome, and no conversion experience takes place. Eventually, the skeptic abandons their exploratory pursuit. From a Christian standpoint, what conceivable explanations exist for why a truth-seeking skeptic, in the specific endeavor of seeking an encounter with or a response from the Christian God, might perceive a lack of "results" in their pursuit?