Flint is a material used to make fire by striking a rock or steel against the flint to make sparks. Jesus face was set as flint when he was struck in the face and head during the beating he received, 'And some began to spit on him, and to cover his face, and to buffet him, and to say unto him, Prophesy: and the servants did strike him with the palms of their hands' (Mark 14:65).