taken from "the First Epistle of Clement to the Corinthians"
1 Clem 17:1Let us be imitators also of them which went about in goatskins and sheepskins, preaching the coming of Christ. We mean Elijah and Elisha and likewise Ezekiel, the prophets, and besides them those men also that obtained a good report.
1 Clem 24:1-4Let us understand, dearly beloved, how the Master continually showeth unto us the resurrection that shall be hereafter; whereof He made the Lord Jesus Christ the firstfruit, when He raised Him from the dead. Let us behold, dearly beloved, the resurrection which happeneth at its proper season. Day and night show unto us the resurrection. The night falleth asleep, and day ariseth; the day departeth, and night cometh on. Let us mark the fruits, how and in what manner the sowing taketh place.
1 Clem 34:8For He saith, Eye hath not seen and ear hath not heard, and it hath not entered into the heart of man what great things He hath prepared for them that patiently await Him.
1Clem 50:2Who is sufficient to be found therein, save those to whom God shall vouchsafe it? Let us therefore entreat and ask of His mercy, that we may be found blameless in love, standing apart from the factiousness of men. All the generations from Adam unto this day have passed away: but they that by God's grace were perfected in love dwell in the abode of the pious; and they shall be made manifest in the visitation of the Kingdom of God.
taken from "the Second Epistle of Clement to the Corinthians"
2 Clem 11:7If therefore we shalt have wrought righteousness in the sight of God, we shalt enter into His kingdom and shall receive the promises which ear hath not heard nor eye seen, nor eye seen, neither hath it entered into the heart of man.
2 Clem 12:1-6Let us therefore await the kingdom of God betimes in love and righteousness, since we know not the day of God's appearing. For the Lord Himself, being asked by a certain person when his kingdom would come, said, When the two shall be one, and the outside as the inside, and the male with the female, neither male or female. Now the two are one, when we speak truth among ourselves, and in two bodies there shall be one soul without dissimulation. And by the outside as the inside He meaneth this: by the inside he meaneth the soul and by the outside the body. Therefore in like manner as thy body appeareth, so also let thy soul be manifest by its good works. And by the male with the female, neither male nor female, he meaneth this; that a brother seeing a sister should have no thought of her as a female, and that a sister seeing a brother should not have any thought of him as a male. These things if ye do, saith He, the kingdom of my father shall come.
2 Clem 16:3But ye know that the day of judgment cometh even now as a burning oven, and the powers of the heavens shall melt, and all the earth as lead melting on the fire, and then shall appear the secret and open works of men.
2 Clem 17:4-7For the Lord said, I come to gather together all the nations, tribes, and languages. Herein He speaketh of the day of His appearing, when He shall come and redeem us, each man according to his works. And the unbelievers shall see His glory and His might: and they shall be amazed when they see the kingdom of the world given to Jesus, saying, Woe unto us, for Thou wast, and we knew it not, and believed not; and we obeyed not the presbyters when they told us of our salvation. And their worm shall not die, and their fire shalln ot be quenched, and they shall be for a spectacle unto all flesh.
He speaketh of that day of judgment, when men shall see those among us that live ungodly lives and dealt falsely with the commandments of Jesus Christ.
But the righteous, done good and endured torments and hated pleasures of the soul, when they shall behold them that have done amiss and denied Jesus by their words or by their deeds, how that they are punished with grievous torments in unquenchable fire, shall give glory to God, saying, There will be hope for him that hath served God with his whole heart.
"Let us also be imitators of them which went about... preaching the coming of Christ"