Blue_space that is the same view i have on the subject,mostly realting to your endocrine system and hormone release.

I would say there always open, some working more efficently than others thats where the imbalance comes from. You have to get each one working efficently together by getting to know yourself through meditation and find out which ones need to be worked on.

I wouldnt be scared about "opening" them if their not ready they wont "open" however ther fear of doing such can lead to the syptoms previously talked about.

“Fear is the path to the dark side. Fear leads to anger. Anger leads to hate. Hate leads to suffering." Yoda says it best.