ISB ~ 1 Corinthians 4 v1

stewards:House managers in charge of their master’s estate. It refers in this context to spiritual ministers who manage the affairs of God’s household, the Church (Lk 12:42-48; 1 Tim 3:15; CCC 859).

the mysteries of God:The revealed truths of the New Covenant, which were hidden in ages past but are now manifest through the gospel. To an extent they remain mysteries because the human mind can understand the divine work of God only in a limited way.