What is it about bad ideas?
I’m not thinking of anything as egregious as false teaching making its way into the church, though that tends to happen on a regular basis too. No, I’m thinking more of the natural preferences and tendencies we have and assumptions we make that can hinder the work of God and drive a wedge in between believers.
The worst part about bad ideas is that, unlike many varieties of false or heretical teaching, they often come from good people, which makes them that much more sensitive to deal with. They are also not demonstrably sinful in most cases, making it more difficult to mount a case against them and disinclining those who harbor them to easily abandon them.