One of the best parts about ActiveRecord is it's associations. When you access the instance method `resources` in your topic, you'll get what's known as an [ActiveRecord::Association](http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html) object, which provides cool methods like `create` and `where` scoped down to the specific topic that has these `resources`

This means you could rewrite this code like:

```
resources.create(resource_attributes)
```