From our Synod's website: Clement (ca. A.D. 35–100) is remembered for having established the pattern of apostolic authority that governed the Christian Church during the first and second centuries. He also insisted on keeping Christ at the center of the Church's worship and outreach. In a letter to the Christians at Corinth, he emphasized the centrality of Jesus' death and resurrection: “Let us fix our eyes on the blood of Christ, realizing how precious it is to His Father, since it was poured out for our salvation and brought the grace of repentance to the whole world” (1 Clement 6:31). Prior to suffering a martyr's death by drowning, he displayed a steadfast, Christ-like love for God's redeemed people, serving as an inspiration to future generations to continue to build the Church on the foundation of the prophets and apostles, with Christ as the one and only cornerstone.
Treasury of Daily Prayer offers a beautiful collect for this commemoration, asking: "Grant that Your Church may be anchored in Your truth by the presence of the Holy Spirit and kept blameless until the coming of our Lord Jesus Christ." (p. 944)
My favorite quote from St. Clement of Rome is from his first letter to the Corinthians:
"Similarly we also, who by His will have been called in Christ Jesus, are not justified by ourselves, or our own wisdom or understanding or godliness, nor by such deeds as we have done in holiness of heart, but by that faith through which Almighty God has justified all men since the beginning of time. Glory be to Him, forever and ever, Amen." - St. Clement of Rome (Letter to the Corinthians, par. 32)