"God, I don't know whether you exist or not, but if you do, please show me who you are."
If you say that prayer, mean it, are intellectually honest with the data, and morally honest with yourself, you will not have to coldly and forcibly "believe as a matter of policy" as Dawkins would suggest. (The God Delusion, p130).
Rather, the Spirit of Jesus Christ will take care of the rest.
"Ask and it will be given to you; seek and you will find; knock and the door will be opened to you. For everyone who asks receives; he who seeks finds; and to him who knocks, the door will be opened." (Mt 7:8-8).