Thomas the Apostle - often referred to as “Doubting Thomas” - was one of the twelve main disciples of Jesus Christ. In the Gospel of John, Thomas famously doubted Jesus’ resurrection, telling the other disciples, “Unless I see the nail marks in his hands and put my finger where the nails were, and put my hand into his side, I will not believe” (John 20:25).

Thomas’ moment of skepticism earned him the nickname “Doubting Thomas,” which evolved into a term for anyone who needs proof before they believe something, a skeptic.