I heard some testimonies the other day that really stressed me out. Several people shared that Christianity implies the need for a “leap of faith,” or that “God’s existence cannot be proved because then faith would not be faith.” These ideas will not strengthen faith when Christians are confronted by worldly philosophy.
God's existence is as plain as the nose on our faces (Romans 1:18-19). Many, from The Apostle Paul to St. Augustine to St. Thomas Aquinas to John Gerstner to Greg Bahnsen, have proven the faith beyond doubt. The problem is not the lack of evidence, but the suppression of it. The unbeliever does not want to submit to God, so he or she refuses to acknowledge the truth that is plain (Romans 1:21-23).
There is no need to fall back on a position that says God's existence is to be taken on faith, as if faith is something that goes beyond reason. The Christian faith is the wisdom of God that makes foolish the wisdom of this world (1 Corinthians 1:18-25). The Christian faith is "the assurance of things hoped for, the conviction of things not seen" (Heb 11:1, ESV, emphasis mine).
My faith is something I am sure of, convinced of beyond any doubt.