How do Reformed theologians interpret and apply 1 Corinthians 4:6, where Paul says, ‘Do not go beyond what is written, and learn from us’?

In Reformed teaching, how can we discern when a doctrine is genuinely grounded in Scripture versus when we’ve gone beyond what the text actually says (1 Cor 4:6)? As a lay student seeking to handle God’s Word reverently, how can I develop the habit of distinguishing between what Scripture explicitly states and what comes from common assumptions or inherited interpretations—so that I do not “go beyond what is written,” especially on topics that the Bible addresses only briefly or selectively, particularly from a Reformed view?