18 Let no man deceive himself. If any man among you thinks that he is wise in this age, he must become foolish, so that he may become wise. 19 For the wisdom of this world is foolishness before God. For it is written, “He is the one who catches the wise in their craftiness”; 20 and again, “The Lord knows the reasonings of the wise, that they are useless.” 21 So then let no one boast in men. For all things belong to you, 22 whether Paul or Apollos or Cephas or the world or life or death or things present or things to come; all things belong to you, 23 and you belong to Christ; and Christ belongs to God.