Question: What use is it for you Christians to say that after your conversions you experienced peace, when that's what every convert says—no matter what their religion? And how do you know that it's god himself that answers your prayers, when every other religion says the same thing about their gods.
Answer: Christians usually feel that the burden of sin has been lifted from their hearts after becoming born-again, that is, becoming true children of God (Rom 1:12). They also feel something additional: An emotional lift. The two are often confused. For example, a person who enters a new romantic relationship usually feels a lifted emotion. But so doesn’t a person who joins a book club, their school’s PTA, or a civic organization. We respond to positive hopes with positive emotions, and these may run concurrently with the Christian’s feeling of peace (John 14:27), but they are different elements.
A person who moves from one religion to another, one who joins a cult, or even one who walks out on their perception of godly religion, will feel an emotional release. This release may easily account for any claims made by non-Christians that they feel the same peace as do Christians. They cannot, however. Why not? Because you cannot have peace—true peace, that is—without the Prince of Peace, Jesus Christ (Isa. 9:6).
If a person chooses to convert from Catholicism to Islam, what would you expect them to say about the change? That they feel horrible? No. Since they have acted on a choice which they’ve previously decided will improve their lot, they will report peace, but that peace is not the same as Christian peace, and time will show that it has no staying power. A mere feeling of peace is often a feeling of comfort—of living in an easy moment. True peace is proven as we walk through this world and experience hardships, which are the trials of faith.
About God and prayers, since other gods do not exist, they do not hear prayers. Only the God of the Bible hears prayers…because only the God of the Bible exists. How could a god that does not exist hear prayers? And when a god does not exist, could any number of people praying to him make him, this non-entity, hear? Or could any number of people reporting that a non-existent god hears them make him hear? No. People lie continually—and by the billions. They lie to themselves and to others.
““What profit is an idol when its maker has shaped it, a metal image, a teacher of lies? For its maker trusts in his own creation when he makes speechless idols! Woe to him who says to a wooden thing, Awake; to a silent stone, Arise! Can this teach? Behold, it is overlaid with gold and silver, and there is no breath at all in it. But the Lord is in his holy temple; let all the earth keep silence before him.”” (Habakkuk 2:18–20, ESV)
Fortunately, no number of lies can ever undo the truth. Jesus said, “I am the way, and the truth, and the life; no one comes to the Father but through Me.” (John 14:6)
The person who is himself The Truth claims that he is the exclusive conduit to the Father. Everyone who dies not believing in Jesus Christ perishes eternally. They go to hell where they can continue to pray to their non-existent gods forever (Mat 13:40-43).