In what things should we agree to disagree?

TL;DR:

Christians must be unwavering on the core truths of the gospel, but on non-essential matters. Love allows room to “agree to disagree,” but not on essentials of our faith in Christ.

Christians are called to stand united on the core truths of the gospel, recognizing that Christ’s life, death, and resurrection fully secure salvation (1 Corinthians 15:3–5; Galatians 5:2–4; Hebrews 10:14). These essential doctrines leave no room for compromise, as Paul warns that any deviation from the gospel—even by an angel—demands rejection (Galatians 1:6–9). Yet Scripture also allows freedom on secondary matters that do not affect salvation, such as alcohol, holidays, the age of the Earth, or some worship styles and practices, where believers may hold differing convictions (Romans 14:2–3, 22–23; Colossians 2:16–17). In areas where people differ, truth, love, and peace must guide our interactions, demonstrating to the world the unity Christ intended for His followers (John 13:35; Romans 14:19). The tension between firm conviction on essentials and gracious liberty on non-essentials challenges us: if we truly reflect Christ, will our disagreements display division, or will they testify to the maturity and love that mark His body?

from the old testament

Believers cannot compromise on the truth that Jesus paid for our sins with His crucifixion. Isaiah prophesied of a Savior who would be "pierced for our transgressions, . . . crushed for our iniquities . . . by his wounds we are healed" (Isaiah 53:5).

from the new testament

Paul stated in no uncertain terms that we cannot compromise on the gospel: "But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let them be under God’s curse!" (Galatians 1:6-9)
Any deviation from the core message of the gospel is grounds for separation from someone else who claims to be a Christian. Paul summarized the gospel as, “I delivered to you as of first importance what I also received: that Christ died for our sins in accordance with the Scriptures, that he was buried, that he was raised on the third day in accordance with the Scriptures, and that he appeared to Cephas, then to the twelve” (1 Corinthians 15:3–5).
Paul asserted that salvation is by God's grace alone (Ephesians 2:8–9), not works or obedience to the Old Testament law (Galatians 5:2–4). Jesus did everything necessary to bring salvation (Hebrews 10:14). Anything that undermines the sufficiency of Jesus’ life, death, and resurrection undermines the Gospel. In that, then, we must be of one mind (Philippians 1:27; Ephesians 4:4–6).
Romans 14 addresses disagreement among Christians on secondary issues. Paul indicates that we have freedom in such matters, as long as we aren't violating our conscience (Romans 14:22–23). In such cases, Christians can come to different conclusions without judging each other for it (Colossians 2:16–17).
Love is the governing principle of all such debates. Jesus said that the world would know we are His disciples by our love (John 13:35). Believers are to pursue peace with one another (Romans 14:19) by “agreeing to disagree” on any matter that does not result in undermining the purity of the gospel.

implications for today

If the world could see your interactions with other believers, what would they conclude about Christianity? How we treat fellow believers says a great deal to the world about our Savior.

Everyone has their pet issues. If you grew up with an alcoholic parent, maybe you're especially sensitive to Scriptures that discuss the dangers of alcohol and you abstain from it. Or maybe you have fond memories of certain holidays and want your kids to experience the same; other believers focus on the pagan origins of certain holidays and avoid them. Some hold to a young Earth, and some hold to an old Earth. We can have differences of opinion, if we have sought our conviction biblically and the Bible is not conclusive about something. What we shouldn't do is judge other believers on such secondary issues or be so dogmatic about them that the world notices our disagreements rather than our love.

How do we demonstrate our love for others while respecting their different views on non-critical topics? God gives us the answer through the apostle Paul: "'All things are lawful,' but not all things are helpful. 'All things are lawful,' but not all things build up. Let no one seek his own good, but the good of his neighbor" (1 Corinthian 10:23-24). Will our disagreements push people away from Christ, or will our unity in love—even amid diversity—draw the world closer to Him? The way we navigate secondary differences is not just about personal preference; it is a witness to the transformative power of the gospel in shaping hearts that pursue others’ good above their own.

understand

Christians must stand united on the core truths of the gospel.
Believers may differ on secondary matters that are not biblically clear or do not hinge on salvation.
Truth, love, and peace must govern how we handle such differences.

reflect

Which secondary issues in your own life do you feel most strongly about, and how do you ensure your convictions reflect truth and love?
How do your interactions with believers who hold different views demonstrate Christ’s love to the world?
How do you respond with believers who are dogmatic about secondary issues?

engage

What does it communicate to outsiders when believers maintain unity on core gospel truths but graciously disagree on secondary issues?
How can churches maintain doctrinal clarity while also allowing freedom in non-essential areas?
In what practical ways can believers pursue unity and peace without minimizing important theological convictions?