SCS definitions needed: How are the brain and mind different?

How are the brain and the mind different in SCS teachings and viewpoint? How are they the same? Many articles online talk about their differences, but I’d like to hear this from a SCS perspective, as I am on a path to improve myself through meditation, writing, and attention. For example, on page 20 of “How to Feel Better” booklet, the word “mind” and “brain” are both used. Can you define these two words? Thank you!