Why is preaching the gospel considered an ordinance?

Preaching the gospel is considered a vital ordinance because it is commanded by God, much like baptism and the Lord's Supper. Paul refers to the necessity of preaching and the great commission given to believers to spread the gospel. This act of preaching is the primary means through which God effectually calls His elect and enables them to come to Christ. The significance of this ordinance lies in its role in salvation history and the life of the Church, connecting believers through the shared proclamation of the gospel's truths.