The rule of empiricism is experience first, belief second. The apostle Paul had an experience with God that obviously resulted in his belief in God. Most of us don't get an experience like Paul got. For a person who doesn't believe in God, I guess it would be nearly impossible to experience God. Whatever types of daily experiences or phenomena encountered by that person, the conclusion or explanation would never include God People do not tend to explain things that happen to themselves with answers that they do not believe in.
Empiricism is an ignorant and arrogant philosophy.
It prides itself on knowing the boundaries of reality. It is a self-centered philosophy as it relies on a person's sensing abilities to determine what is real and what is not. Throughout the Bible, God and Jesus focus on belief as the key to experiencing spiritual reality. Lack of belief is what continually gets in the way of people being able to experience what God has provided for them. As I reflect on my Christian experience, the more I believe, the more of God I experience, and the more of spiritual reality I see.