Ante-Nicene Fathers, Vol III
Chapter LV.-The Christian Idea of the Position of Hades; The Blessedness of Paradise Immediately After Death. The Privilege of the Martyrs.
How is it that the most heroic martyr Perpetua on the day of her passion saw only her fellow-martyrs there, in the revelation which she received of Paradise, if it were not that the sword which guarded the entrance permitted none to go in thereat, except those who had died in Christ and not in Adam? A new death for God, even the extraordinary one for Christ, is admitted into the reception-room of mortality, specially altered and adapted to receive the new-comer. Observe, then, the difference between a heathen and a Christian in their death: if you have to lay down your life for God, as the Comforter counsels, it is not in gentle fevers and on soft beds, but in the sharp pains of martyrdom: you must take up the cross and bear it after your Master, as He has Himself instructed you.
Translated by Holmes 1870.