Black Obsidian is a stone that reveals truths. These may not be the most comfortable truths you've ever faced. In fact, some of them may be downright harsh. The thing that makes black obsidian meaning so powerful for those who have experienced it, is that it forces you to acknowledge behaviors or past actions that you've tried to ignore. Even those regrettable decisions that you've successfully managed to justify in your mind will have to contend with black obsidian's no-nonsense healing energy. That's not to say that it's all confrontation with black obsidian stone. It's also a crystal for release.
If you've been avoiding a deeper understanding of why you are the way you are, or what you can do to become the person you want to be, Black Obsidian will force you to stop avoiding and start addressing.