The suffering itself of Martyrdom was in some respects peculiar. It was a death, cruel in itself, publicly inflicted: and heightened by the fierce exultation of a malevolent populace. When we are in pain, we can lie in peace by ourselves. We receive the sympathy and kind services of those about us; and if we like it, we can retire altogether from the sight of others, and suffer without a witness to interrupt us. But the sufferings of martyrdom were for the most part public, attended with every circumstance of ignominy and popular triumph, as well as with torture. Criminals indeed are put to death without kindly thoughts from bystanders; still, for the most part, even criminals receive commiseration and a sort of respect. But the early Christians had to endure "the shame" after their Master's pattern. They had to die in the midst of enemies who reviled them, and in mockery, bid them (as in Christ's case) come down from the cross. They were supported on no easy couch, soothed by no attentive friends; and considering how much the depressing power of pain depends on the imagination, this circumstance alone at once separates their sufferings widely from all instances of pain in disease. The unseen God alone was their Comforter, and this invests the scene of their suffering with supernatural majesty, and awes us when we think of them.
--Blessed John Henry Newman, "Martyrdom", Parochial and Plain Sermons. Vol. 2