Saint Jude regarded himself as having one goal, one distinction in life, and this was to be permanently committed to the service of Jesus Christ. This permanent commitment ultimately rewarded Jude with the crown of martyrdom.
When Jude introduces himself, he also addresses himself to his fellow Christians who also are called, loved, and kept by Jesus Christ. Now a person can be called to an office, a duty, or a responsibility; or he may be invited to a party or some festive occasion; or as on other occasions a person can be called to render a judgment on oneself. So Jude tells us first he is called to be an Apostle, and how joyful this makes him, even though he is ever mindful of the saying of Christ: "To whom much is given, much is expected." Jude is ready to render judgment of himself.
Like Jude, every Christian who is committed to Christ has a responsibility, accompanied by the joy of the call, and must always be ready to meet judgment of himself because of the talents that God gave him.
As the knowledge of being loved by God grows in the Christian, Jude shows how the psychology of the Christian changes: he no longer fears God. Jude is quite conscious of this fact. The manifestation of God's love is made known in the merciful coming of the Saviour. And the coming of the Lord taught Jude that God is a Father who desires that His children associate with His life and share it intimately.
In telling us that a Christian is one who is kept by Christ, Jude implies that a Christian is never alone. Christ is always watching over His own.
Jude teaches that the Lord protects us, as each person encounters the drudgery, despair, and disillusionment of daily life. Jude seems to be telling us much about himself, and every follower of Christ. Jude reminds us that those who are called --those dear to God the Father-- are kept safe for Jesus Christ.