4 I thank my God always concerning you for the grace of God which was given you in Christ Jesus, 5 that in everything you were enriched in Him, in all speech and all knowledge, 6 even as the testimony concerning Christ was confirmed in you, 7 so that you are not lacking in any gift, awaiting eagerly the revelation of our Lord Jesus Christ, 8 who will also confirm you to the end, blameless in the day of our Lord Jesus Christ. 9 God is faithful, through whom you were called into fellowship with His Son, Jesus Christ our Lord. 1 Corinthians 1:4-9 (NASB)
Why do authentic Christians persevere? Carefully read the passage I placed at the top of this post. Genuine Christians persevere to the end because God is faithful. The faithfulness of man is at best unreliable. Also, notice that Paul did not say that Christians persevere because of faithful ministers to lead and guide them. No, God would never trust His children’s perseverance to mere men. Instead, the whole burden of our salvation must rest on the faithfulness of our covenant God.