Allegory

Isaiah 59
4 None calleth for justice, nor any pleadeth for truth: they trust in vanity, and speak lies; they conceive mischief, and bring forth iniquity.

Here the evil of false doctrine is dealt with. It is straight forward.

Next Verse From Isaiah 59
5 They hatch cockatrice' eggs, and weave the spider's web: he that eateth of their eggs dieth, and that which is crushed breaketh out into a viper.

Here is the message symbolized. This is what gets your attention. This is what gives you nightmares. This is what puts the fear of God in you....