Thaddaeus, also known as Judas son of James, is a less prominent but significant apostle in the New Testament, distinguished from Judas Iscariot and known for his questioning of Jesus about His revelations, extensive missionary journeys across regions including Judea, Samaria, and Syria.
The Book of Jude warns against false teachers who distort the truth and lead believers astray, while encouraging believers to contend earnestly for the faith, to build themselves up in their most holy faith, and to remain steadfast in God’s love and mercy, emphasizing the importance of doctrinal integrity and spiritual vigilance in the face of deception.