Herod saw Jesus as a rival to his power. However, Jesus was the rightful king and Herod was no match for him.
We can allow idols to become rivals for our affection for Jesus. These can be things we enjoy like food, relationships, sport etc, good things like going to church, serving, charity or things we fear and try to appease (bullies, organisations etc).
We give those things up not because they are equal rivals but exactly because they are nothing and worthless compared to Christ.
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