Dark horse, vanilla life

A phrase given to the author in a dream, without a clue as to its meaning. To her, for her. She was told you have a lot of passionate energy, and you've judged this aspect of yourself, making it go into a dark corner. But without this passion, this magic, you're living a vanilla life instead of the rich fullness of everything that could come if you ride the dark horse. With this book, she's saddled up.