The nearly naked king emerging from the background has been generally considered to be the Antichrist. Herod of course was an Antichrist figure. Today's reading at Mass discusses the spirit of the antichrist from the First Letter of John.
Many today are looking to identify THE Antichrist - but as we see in the Bosch detail, and know according to Scripture - his spirit is prevalent among us - he is already in the world. Which is why we must be vigilant - being especially wary of those who attack the Church and the Magisterium.
85 "The task of giving an authentic interpretation of the Word of God, whether in its written form or in the form of Tradition, has been entrusted to the living teaching office of the Church alone. Its authority in this matter is exercised in the name of Jesus Christ." This means that the task of interpretation has been entrusted to the bishops in communion with the successor of Peter, the Bishop of Rome.
86 "Yet this Magisterium is not superior to the Word of God, but is its servant. It teaches only what has been handed on to it. At the divine command and with the help of the Holy Spirit, it listens to this devotedly, guards it with dedication and expounds it faithfully. All that it proposes for belief as being divinely revealed is drawn from this single deposit of faith."
87 Mindful of Christ's words to his apostles: "He who hears you, hears me", the faithful receive with docility the teachings and directives that their pastors give them in different forms. - CCC
+ + +
"We belong to God, and anyone who knows God listens to us,
while anyone who does not belong to God refuses to hear us.
This is how we know the spirit of truth and the spirit of deceit." - 1 John 3
Mindful of Christ's words to his apostles: "He who hears you, hears me", the faithful receive with docility the teachings and directives that their pastors give them in different forms.
Bonus: A thought about sin. Today's reading from John also mentions:
And his commandment is this:we should believe in the name of his Son, Jesus Christ,and love one another just as he commanded us.If we truly love one another, we would not cause another to sin, nor would we lead them into temptation or use them for sinful pleasure or our selfish self indulgence. Beloved, do not trust every spirit ...