The earliest unambiguous instance of Christian mortalism is found in Tatian's Address to the Greeks from the second half of the second century. Tatian writes: "The soul is not in itself immortal... If, indeed, it knows not the truth, it dies, and is dissolved with the body, but rises again at last at the end of the world with the body, receiving death by punishment in immortality. But, again, if it acquires the knowledge of God, it dies not, although for a time it be dissolved." Tatian's contemporary Athenagoras of Athens came close to mortalism by teaching that souls sleep dreamlessly between death and resurrection: "hose who are dead and those who sleep are subject to similar states, as regards at least the stillness and the absence of all sense of the present or the past, or rather of existence itself and their own life." However, the best-known case of mortalism in the early church is that recorded by Eusebius of Caesarea: