ESV, 1 Corinthians 3:
Paul concluded the chapter with what he began the chapter with:
Paul complained to the Corinthians of the divisions in the church. The context here is the church.3 for you are still of the flesh. For while there is jealousy and strife among you, are you not of the flesh and behaving only in a human way? 4For when one says, “I follow Paul,” and another, “I follow Apollos,” are you not being merely human?
Build on the foundation of Christ only. Don't use any other materials:10 According to the grace of God given to me, like a skilled master builder I laid a foundation, and someone else is building upon it. Let each one take care how he builds upon it. 11For no one can lay a foundation other than that which is laid, which is Jesus Christ.
Apply this truth to individual believers:12 Now if anyone builds on the foundation with gold, silver, precious stones, wood, hay, straw— 13each one’s work will become manifest, for the Day will disclose it, because it will be revealed by fire, and the fire will test what sort of work each one has done. 14If the work that anyone has built on the foundation survives, he will receive a reward. 15If anyone’s work is burned up, he will suffer loss, though he himself will be saved, but only as through fire.
We believers together form the temple of God because God dwells in every one of us.16 Do you [plural] not know that you [together] are God’s temple and that God’s Spirit dwells in you [individually]? 17 If anyone destroys God’s temple, God will destroy him. For God’s temple is holy, and you [plural, as a whole] are that temple.
Paul concluded the chapter with what he began the chapter with:
Don't divide; we are all God's.21So let no one boast in men. For all things are yours, 22whether Paul or Apollos or Cephas or the world or life or death or the present or the future—all are yours, 23and you are Christ’s, and Christ is God’s.