As Christians, we have hope that we shall persevere to the end. The reasons we shall be found blameless in the end, are all found in our God. Charles H. Spurgeon writes on this topic:
I give thanks to my God always for you because of the grace of God that was given you in Christ Jesus, that in every way you were enriched in him in all speech and all knowledge—even as the testimony about Christ was confirmed among you—so that you are not lacking in any gift, as you wait for the revealing of our Lord Jesus Christ, who will sustain you to the end, guiltless in the day of our Lord Jesus Christ. God is faithful, by whom you were called into the fellowship of his Son, Jesus Christ our Lord. (1 Corinthians 1:4-9 ESV)
We are variable as the wind, frail as a spider’s web, weak as water. No dependence can be placed upon our natural qualities, or our spiritual attainments; but God abideth faithful. He is faithful in His love; He knows no variableness, neither shadow of turning. He is faithful to His purpose; He doth not begin a work and then leave it undone. He is faithful to His relationships; as a Father He will not renounce His children, as a friend He will not deny His people, as a Creator He will not forsake the work of His own hands. He is faithful to His promises, and will never allow one of them to fail to a single believer. He is faithful to His covenant, which He has made with us in Christ Jesus, and ratified with the blood of His sacrifice. He is faithful to His Son, and will not allow His precious blood to be spilled in vain. He is faithful to His people to whom He has promised eternal life, and from whom He will not turn away.
This faithfulness of God is the foundation and cornerstone of our hope of final perseverance. The saints shall persevere in holiness, because God perseveres in grace. He perseveres to bless, and therefore believers persevere in being blessed. He continues to keep His people, and therefore they continue to keep His commandments. This is good solid ground to rest upon, and it is delightfully consistent with the title of this little book, “All of Grace.” Thus it is free favor and infinite mercy which ring in the dawn of salvation, and the same sweet bells sound melodiously through the whole day of grace. (All of Grace)