Patristics

“For if we believed that we should live only the present life, then we might be suspected of sinning, through being enslaved to flesh and blood, or overmastered by gain or carnal desire; but since we know that God is witness to what we think and what we say both by night and by day, and that He, being Himself light, sees all things in our heart, we are persuaded that when we are removed from the present life we shall live another life, better than the present one, and heavenly, not earthly (since we shall abide near God, and with God, free from all change or suffering in the soul, not as flesh, though we shall have flesh, but as heavenly spirit), or, falling with the rest, a worse one and in fire; for God has not made us as sheep or beasts of burden, a mere by-work, and that we should perish and be annihilated. On these grounds it is not likely that we should wish to do evil, or deliver ourselves over to the great Judge to be punished.” Athenagoras, A Plea for the Christians, XXXI, ANF 2:146