What is the most important thing in the Bible, the Christian life, etc.?

1 Corinthians 15 “Now, brothers and sisters, I want to remind you of the gospel I preached to you, which you received and on which you have taken your stand. ² By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain. ³ For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures, ⁴ that he was buried, that he was raised on the third day according to the Scriptures”

The most important thing is this:

Jesus Christ our Lord, who died for our sins and rose from the dead to make us righteous by faith alone.

Our works are not important because they are nothing compared the cross!

Our Bible knowledge is not important, because you don’t need to know the entire Bible to be saved but only believe in Jesus who died on the cross and rose from he dead!

The only thing that matters is the love of Jesus on the cross and His resurrection power.

Martha was worried about many things but Jesus told her to focus on one thing like Mary

Luke 10 “³⁸ As Jesus and his disciples were on their way, he came to a village where a woman named Martha opened her home to him. ³⁹ She had a sister called Mary, who sat at the Lord’s feet listening to what he said. ⁴⁰ But Martha was distracted by all the preparations that had to be made. She came to him and asked, “Lord, don’t you care that my sister has left me to do the work by myself? Tell her to help me!” ⁴¹ “Martha, Martha,” the Lord answered, “you are worried and upset about many things, ⁴² but few things are needed—or indeed only one. Mary has chosen what is better, and it will not be taken away from her.”

Martha is like a lot of believers who are focused on their works and other things.

But Jesus told her to look at Mary who focused on one thing.

What was Mary focused on? It was the death and resurrection of Jesus.

Mark 14 ” ³ While he was in Bethany, reclining at the table in the home of Simon the Leper, a woman came with an alabaster jar of very expensive perfume, made of pure nard. She broke the jar and poured the perfume on his head. ⁴ Some of those present were saying indignantly to one another, “Why this waste of perfume? ⁵ It could have been sold for more than a year’s wages and the money given to the poor.” And they rebuked her harshly. ⁶ “Leave her alone,” said Jesus. “Why are you bothering her? She has done a beautiful thing to me. ⁷ The poor you will always have with you, and you can help them any time you want. But you will not always have me. ⁸ She did what she could. She poured perfume on my body beforehand to prepare for my burial. ⁹ Truly I tell you, wherever the gospel is preached throughout the world, what she has done will also be told, in memory of her.”

This Mary was also the first to see the resurrected Lord Jesus in Mark 16. She preached the gospel of the death and resurrection to the 12 Apostles and then they saw Jesus with their own eyes and believed.

Paul the Apostle, also stated that the most important thing for him was Jesus and the Cross:

1 Corinthians 1 “¹⁰ I appeal to you, brothers and sisters, in the name of our Lord Jesus Christ, that all of you agree with one another in what you say and that there be no divisions among you, but that you be perfectly united in mind and thought. ¹¹ My brothers and sisters, some from Chloe’s household have informed me that there are quarrels among you. ¹² What I mean is this: One of you says, “I follow Paul”; another, “I follow Apollos”; another, “I follow Cephas”; still another, “I follow Christ.” ¹³ Is Christ divided? Was Paul crucified for you? Were you baptized in the name of Paul? ¹⁴ I thank God that I did not baptize any of you except Crispus and Gaius, ¹⁵ so no one can say that you were baptized in my name. ¹⁶ (Yes, I also baptized the household of Stephanas; beyond that, I don’t remember if I baptized anyone else.) ¹⁷ For Christ did not send me to baptize, but to preach the gospel—not with wisdom and eloquence, lest the cross of Christ be emptied of its power.”

Why are Christians divided into so many denominations? It’s because they don’t focus on the cross of Jesus Christ. They focus on so many other things (theological issues, self-improvement through works, etc…)

1 Corinthians 2 “² For I resolved to know nothing while I was with you except Jesus Christ and him crucified. ³ I came to you in weakness with great fear and trembling. ⁴ My message and my preaching were not with wise and persuasive words, but with a demonstration of the Spirit’s power, ⁵ so that your faith might not rest on human wisdom, but on God’s power.”

The power of God, the love of God is found in the cross of Jesus.

Ephesians 3 “And I pray that you, being rooted and established in love, ¹⁸ may have power, together with all the Lord’s holy people, to grasp how wide and long and high and deep is the love of Christ, ¹⁹ and to know this love that surpasses knowledge—that you may be filled to the measure of all the fullness of God.”

We as believers, have every spiritual blessing because of the cross of Jesus. We are made righteous, sinless, holy, blameless, forgiven all sin, glorious, sanctified, justified, cleansed, glorified, all because of what Jesus did on the cross.

Everyone who believes in Jesus is made righteous, forgiven all sin by the cross and resurrection of Jesus Christ.