Leiva points to Matthew's gospel as being deeply ecclesial because it is first Christological. He comments on the Greek text, demonstrating to the reader nuances in the text that defy translation into English without serious revision of the text. Leiva uses linguistic analysis to aid the non-Greek reader with the literal meaning of the text; numerous quotes from the Fathers and the liturgy of the church demonstrate the way the Tradition has lived and read the Word of God. His theological reflection vivifies doctrine by seeking its roots in the words and actions of Jesus.