To understand mental strength, you have to learn how your thoughts, behaviours, and feelings are all intertwined, often working together to create a dangerous downward spiral as in the preceding example.
Is the above sentence grammatically correct? Isn't this part of the sentence, "often working together to create a dangerous downward spiral as in the preceding example", make it run-on sentence?
Also, what is the rule behind using phrases like this "as in the preceding example?"
Thanks for your help and time!
