"Surrender" in this sense means something like fully facing reality and not demanding that it be other than it is. Easier said than done, of course. Someone who can do that probably becomes more capable of action, because they can bear the consequences of their actions.
There's a story of Beckett walking with a friend in Paris when a guy approaches saying how he's just been robbed and can he have Beckett's jacket. Beckett takes off his jacket and hands it to him. They walk on. The friend says: "why did you do that? he obviously made that up". Beckett says: "I couldn't take the chance of being wrong." I'm not sure why I thought of that just now, but he was clearly an extraordinary human.