"Faith," wrote the Quaker scholar Elton Trueblood, "is not belief without proof, but trust without reservation." Yet the fact is, faith seems to contradict the world of reality. It is no wonder that the writer of Hebrews described faith as the "conviction of things not seen" (Hebrews 11:1, NASB). It is the battle of the tangible versus the intangible, the seen versus the unseen, the material versus the spiritual.