The most effective way for someone to start believing in God seems to be for them to ask on forums, look at proof and do the work themselves, while genuinely trying to find answers. That way, they don't instantly reject and gloss over the proofs you give them. One thing I think atheists (people who actually believe there is no god) tend to assume is that there is no god. I think that when they encounter proof of a god, they assume that there is no god and then conclude that because there is no god, the proof there is a god must be wrong. Assuming something is believing it without proof and believing something without proof is irrational. But now atheists might think this blog is wrong because there is no god. God has atheists like these wrapped around their finger; so well deceived by the god who fools them, it's comical. I think no proof could prove to these atheists that God exists. I think they have so much faith in what they could not prove to even most scientists, it shows what a good job God did at deceiving them.
By the way, God hides what he does with all sorts of excuses and has limitless power to do so. The only reason I know about some things that God does is because he chose not to hide those things from me. He may hide that he even let me know, with excuses, from you, though.