By inviting their questions, we unleash the power of intrinsic motivation because all of us tend to develop more enthusiasm for, and ultimately become more skillful at, pursuing questions about which we’re genuinely curious than those handed to us by someone else.
This reminds me of parents who always answer the "why" given to them by their children. They can say anything and their child would ask why and they'd always give them an answer. It shows that they're not only patient, but also willing to give answers.