United by the Holy Spirit: God is faithful, who has called you into fellowship with his Son. 1 Corinthians 1:9

The First Epistle to the Corinthians begins with an acknowledgment of God for the spiritual gifts received in the Church of Corinth. This Church had been founded by Paul, and the life-giving teaching of the faith had sprouted with force in the new believers in Jesus. This expression of gratitude from the apostle Paul is of fundamental importance because if the Christian life depended on fulfilling imperatives or commands, the free action of the Holy Spirit, with his spiritual love after the miracle of Pentecost, in the believers would be meaningless.
The Kingdom of God is more than doing one thing or not doing another; it is a call to a new kind of freedom, the life according to the spirit, and this is what Paul expressed in his first letter to the Corinthians. In the Greek city of Corinth, during his second missionary journey, Paul was able to begin to see, after many failures, the fruits of his preaching, he was imprisoned in the city of Philippi and had to flee hastily at night from the city of Thessalonica, among other events, and this is why Paul was always very grateful with the Corinthians, and he expressed this fact in this beautiful letter.
And Paul was clear in his spiritual teaching, the gifts received from above must serve to a higher purpose, and that purpose is the life in communion with the brothers and the Holy Spirit. And so the apostle Paul wrote these words: "God is faithful, who has called you into fellowship with his Son, Jesus Christ our Lord" 1 Corinthians 1:9.
The Holy Spirit, through faith, calls Christians to form one spiritual body with Christ as head, and this is what Paul also expressed in his teaching. And the communion mentioned by Paul is fundamentally the concord of minds and hearts, a situation in which sharing and giving prevail over selfishness and pettiness, in other words, there can be no strategies of concealment in communion. Ultimately, communion is the most visible fruit of faith, because the other is a brother, and brothers help each other; and Paul lovingly thanked God for this perfection, which served as an example to the pagans because the believers were united with Christ.

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