There are four words that will help with your study of this Sunday’s passage beforehand.
We never outgrow the nourishing milk of the Word (1 Peter 2:2), but we cannot grow strong unless we also have the “solid food” (Hebrews 5:12-14).
Everybody has a place in the Lord’s harvest, and all are doing His work (John 4:34-38). There must be no competing or comparing, for the Lord alone recognizes the work and gives the reward.
Paul writes about the local church and the materials we put into it as we serve (Prov 2:1-5; 3:13-15). Substituting man’s wisdom for God’s Word means building with perishable materials that will burn up at the judgement seat of Christ.
Glorifying God (v18-23):
Because the Corinthian believers glorified in human teachers (1:12), and human wisdom, they robbed God of the glory that rightfully belonged to Him. “Let no-one boast in men” is a command, not a suggestion.