This is a pretty basic book and Chan tells that right up front. It is not so much that we don't know about the Holy Spirit, it's more like...we don't acknowledge Him - we don't live like His presence is a reality in our lives.
And that is the message of this book
Many times we are discouraged from being too passionate, or too giving, or too...whatever. Do not let others discourage us from following the leading of the Spirit.
As I was finishing the book; reading the last few pages, this struck me
But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness...
Did you catch that? I never have.
Fruit...singular. One Spirit, one fruit, many flavors.