Well, there is no manual entitled "How to Make The Lord Reveal Himself to You". One just has to hope that, if God exists, he will reveal himself to them eventually. If he doesn't, tough. Some Christians present some form of Pascal's Wager to nonbelievers, but that isn't actually an argument for God's existence, and it has very few implications for what we should do or believe just in case God really does exist. The Bible seems to have at least fifty different translations, and each version presents each verse with slightly different grammatical structure. These slight differences can have huge repercussions. Exodus 21:22-25 KJV says that inducing an abortion isn't that bad as long as you don't harm the woman. Exodus 21:22-25 NIV says that inducing an abortion deserves eye-for-an-eye retaliation (death). This radical and highly suspicious difference also exists
between the 1977 NASB and the 1995 NASB, where it arises from one subtle difference in sentence structure. Not to mention that The Bible gives a lot of commands that no modern Christian follows, despite their belief in God, sin, and hell. Even the New Testament is filled with commands about giving up your possessions and befriending the lame, crippled, weak, and homeless. Few believers actually do this, but they say I'm the one going to hell.