Christians run across the same problems that atheists and skeptics do - evil in the world, God's acts of judgment on people in the Bible, etc. - yet their response is to continue to trust in God and worship him. What makes the difference is that Christians know God personally; they have a relationship with him and experiences that have shown them that God is good and trustworthy. This provides them with reason to continue trusting God even when they don't understand the reasons for everything he does.
What sort of information can you learn from prayer? First, if you get a response, then you know that there is a God who is willing and able to communicate with you. An omniscient God knows what sort of response will make sense to you and be convincing to you; receiving such a response can also serve as evidence that God knows you well enough to know how to respond to you. Asking for help and receiving it, particularly when the help is not something that would ordinarily happen or that you could bring about on your own, is evidence of God's loving character.
God treats each person as an individual. For some people, having God answer their prayer to know him would be the most effective way for them to come to believe in God. If a person's prayer to know God is answered, they know that God heard them and answered them - they've interacted with God and know from experience that God will listen to them and respond to them. Simply receiving evidence for God without asking for it first doesn't establish a relationship with God in the way that prayer does.Asking God to reveal himself is a demonstration of one's desire and willingness to know God. If one is not willing to even ask God to reveal himself, one would most likely be unwilling to follow God no matter what evidence or revelation was provided.
http://www.rationalchristianity.net/why_prayer.html#why
What sort of information can you learn from prayer? First, if you get a response, then you know that there is a God who is willing and able to communicate with you. An omniscient God knows what sort of response will make sense to you and be convincing to you; receiving such a response can also serve as evidence that God knows you well enough to know how to respond to you. Asking for help and receiving it, particularly when the help is not something that would ordinarily happen or that you could bring about on your own, is evidence of God's loving character.
God treats each person as an individual. For some people, having God answer their prayer to know him would be the most effective way for them to come to believe in God. If a person's prayer to know God is answered, they know that God heard them and answered them - they've interacted with God and know from experience that God will listen to them and respond to them. Simply receiving evidence for God without asking for it first doesn't establish a relationship with God in the way that prayer does.Asking God to reveal himself is a demonstration of one's desire and willingness to know God. If one is not willing to even ask God to reveal himself, one would most likely be unwilling to follow God no matter what evidence or revelation was provided.
http://www.rationalchristianity.net/why_prayer.html#why