We understand your confusion, and this is a question that many believers grapple with. Let us seek clarity together in the Word of God, for Scripture does not contradict itself—it reveals the fullness of God’s truth in perfect harmony.
First, we affirm that the blood of Jesus Christ covers *all* sin for those who have placed their faith in Him. When we repent and trust in Christ, we are justified—declared righteous before God—not because of our own works, but because of His finished work on the cross. As it is written:
*"For all have sinned, and fall short of the glory of God; being justified freely by his grace through the redemption that is in Christ Jesus"* (Romans 3:23-24).
*"He made him who knew no sin to be sin on our behalf, that we might become the righteousness of God in him"* (2 Corinthians 5:21).
This is the glorious truth of the Gospel: our sins—past, present, and future—are atoned for by the blood of Christ when we are in Him. The only unforgivable sin, as you mentioned, is blasphemy against the Holy Spirit (Matthew 12:31-32), which is the persistent, willful rejection of Christ’s work and the witness of the Spirit.
However, the passage about forgiveness in Matthew 6:14-15 (*"For if you forgive men their trespasses, your heavenly Father will also forgive you. But if you don’t forgive men their trespasses, neither will your Father forgive your trespasses"*) is not contradicting the doctrine of justification by faith. Rather, it speaks to the *evidence* of a regenerate heart. A true believer, indwelt by the Holy Spirit, will exhibit the fruit of repentance—including a forgiving spirit. If someone claims Christ yet harbors unforgiveness, bitterness, or malice, it calls into question whether they have truly experienced the transforming power of the Gospel.
Unforgiveness is a serious sin because it reveals a heart that is not aligned with God’s character. God, in His mercy, forgives us *as we forgive others* (Matthew 6:12). This does not mean our salvation is earned by our forgiveness of others, but rather that a forgiving heart is the natural outflow of a life surrendered to Christ. If we refuse to forgive, we grieve the Holy Spirit (Ephesians 4:30-32) and hinder our fellowship with God, even if our salvation is secure.
Let us also consider 1 John 1:9, which says, *"If we confess our sins, he is faithful and righteous to forgive us the sins, and to cleanse us from all unrighteousness."* This verse is written to believers, reminding us that while our sins are *positionally* forgiven at the moment of salvation, we must *continually* confess and turn from sin to maintain intimate fellowship with God. Unforgiveness, if left unchecked, can harden the heart and lead to spiritual stagnation.
So, to summarize:
- **All sins are covered by the blood of Christ** for those who are in Him (justification).
- **Unforgiveness is a sin** that must be repented of, as it disrupts our fellowship with God and reveals a heart that may not be fully surrendered to Him.
- **A lack of forgiveness calls into question the genuineness of one’s faith**, not because salvation is earned by works, but because true faith produces the fruit of repentance and love.
Let us pray together:
Heavenly Father, we come before You with humble hearts, seeking wisdom and clarity in Your Word. Lord, we thank You for the finished work of Jesus Christ, whose blood covers all our sins. We rejoice in the truth that we are justified by faith alone, not by our own efforts. Yet, Father, we also recognize the seriousness of sin in our lives, including the sin of unforgiveness. Forgive us, Lord, for the times we have held onto bitterness, resentment, or anger toward others. Help us to forgive as You have forgiven us, that our hearts may be aligned with Yours.
We pray for anyone struggling with this truth today, Lord. Give them a deeper understanding of Your grace and the power of the Holy Spirit to transform their hearts. May they walk in the freedom that comes from forgiving others, just as You have forgiven them. Guard their hearts from deception, and let them rest in the assurance of their salvation in Christ Jesus.
We ask all these things in the mighty name of Jesus, for it is only through Him that we have access to You. Amen.
If you are wrestling with unforgiveness in your own life, we encourage you to examine your heart before the Lord. Ask Him to reveal any areas where bitterness or resentment may be taking root. Confess it as sin, and choose to forgive, not because the other person deserves it, but because Christ has forgiven you. This is the mark of a heart transformed by the Gospel. Walk in the freedom and peace that comes from obedience to God’s Word.
Prayer Focus: God, Thank You for loving me. God, I ask You in Jesus’ name please bless me with everything that I stand in need of and everything You want me to have. 
