The Sphinx suggests discrete observation. It suggests that you typically behave like a wise person who knows more than they hear, but who keeps that information to themselves until the time is right.
Because of this Sphinx is associated with the ability to keep secrets, but at the same time manage to wheedle them out of other people.
Another aspect of the Sphinx is that it represents the energy of secrecy, observation, and patience.
If the Sphinx has shown up the way for you to step into your power, then it’s possible that keeping things a bit closer to your chest is a good thing. Listen more than you talk. Be patient. Nothing great or permanent was ever created quickly. And don’t give away too much. Don’t share what you are doing with people who will not want you to do it or to succeed.