For who could fail to admire their nobleness and patient endurance and loyalty to the Master? seeing that when they were so torn by lashes that the mechanism of their flesh was visible even as far as the inward veins and arteries, they endured patiently, so that the very bystanders had pity and wept; while they themselves reached such a pitch of bravery that none of them uttered a cry or a groan, thus showing to us all that at that hour the martyrs of Christ being tortured were absent from the flesh, or rather that the Lord was standing by and conversing with them. The Martyrdom of Polycarp 2:2
Wow. Just incredible.