take org-brain-path for example:
(defcustom org-brain-path (expand-file-name "brain" org-directory) "The root directory of your org-brain. `org-mode' files placed in this directory, or its subdirectories, will be considered org-brain entries." :group 'org-brain :type '(directory))
I want to check its current value with
describe-symbol org-brain-path, but I cannot find
Why and how to check the current value?