"Don't look so dismayed. You must pace yourself. If you're not yet ready, then it's a good thing she identifies that and doesn't push you. She needs you, obviously," though hopefully not to Eleven's own destruction. Aziraphale had seen how heroics played out and he had seen how God's Chosen had been a lamb of sacrifice. That was an unkind, unfair fate.

"She just requires you to train up for your encounter here, where the Lord of Shadows isn't. You will get there. She would not have chosen you otherwise." She undoubtedly had a Plan for Eleven, even if it turned out to not be the plan Eleven wanted for himself. Maybe they all had something to accomplish in their sidequest here, even if only God knew what that was. So many seemed to think they had penitence to pay here for some fault or another, and maybe guilt was just a collective human condition...or maybe they all really were here to do something they had not been achieving back home. He didn't know. He couldn't know.