1 Corinthians 3:21-23
21. let no man glory in men—resuming the subject from 1Co 3:4; compare 1Co 1:12, 31, where the true object of glorying is stated: "He that glorieth, let him glory in THE LORD." Also 1Co 4:6, "That no one of you be puffed up for one against another."
For all things—not only all men. For you to glory thus in men, is lowering yourselves from your high position as heirs of all things. All men (including your teachers) belong to Christ, and therefore to you, by your union with Him; He makes them and all things work together for your good (Ro 8:28). Ye are not for the sake of them, but they for the sake of you (2Co 4:5, 15). They belong to you, not you to them.22. Enumeration of some of the "all things." The teachers, in whom they gloried, he puts first (1Co 1:12). He omits after "Cephas" or Christ (to whom exclusively some at Corinth, 1Co 1:12, professed to belong); but, instead, substitutes "ye are Christ's" (1Co 3:23).
world . . . life . . . death . . . things present . . . things to come—Not only shall they not "separate you from the love of God in Christ" (Ro 8:38, 39), but they "all are yours," that is, are for you (Ro 8:28), and belong to you, as they belong to Christ your Head (Heb 1:2). things present—"things actually present" [ALFORD].23. ye are Christ's—not Paul's, or Apollos,' or Cephas' (1Co 11:3; Mt 23:8-10). "Neither be ye called masters; for one is your Master, even Christ" (Ro 14:8). Not merely a particular section of you, but ye all are Christ's (1Co 1:12).
Christ is God's— (1Co 11:3). God is the ultimate end of all, even of Christ, His co-equal Son (1Co 15:28; Php 2:6-11).