Science, reason and experience may strengthen our faith in Jesus Christ, but we do not believe because of science, reason and experience. In the final analysis, we believe in Jesus because of the supernatural work of the Holy Spirit. For we are God's workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do. Christian faith makes us certain of what we cannot see, certain of what we cannot hear, certain of what we cannot touch or prove by experience or reason or scientific methods. Many people have tried to develop rational proofs of the existence of God that will be so logical, and so powerful, that every atheist or pagan will be overwhelmed and forced to admit the existence of God.
Nothing comes into existence with out a cause.
Therefore the believer says there must be a Creator. If I look at my watch, it is obvious to me that it didn't come into existence without a designer and a builder. So the true believer says, there must be a wise God who designed the world. Given enough millions and billions of years, all that we see around us could have developed by accident, apart from any Designer. The true believer says, the fact that everyone believes in morality, proves that we all must come from a great moral Creator.