1. The things that are close to you are the things you can photograph the best;
2. that she is "praying for the angel of uncertainty."
Pretty much, the first one is just brilliant and also utterly true. I think you have to have a close relationship with a subject-- if it's a still life or landscape, it has to mean something to you, and if it's a person, they have to mean something to you. There has to be a personal relationship there that can be seen in the finished photograph if you expect you photo to invoke any kind of interest or feelings in your audience. At least, that's what I would say if I was the audience. Sally obviously nailed it in her photos of her children growing up, and I think in her others, there is still an emotional tie to some aspect of the photo that is practically tangible in her photos.
As for the second statement, I first thought that it was such a weird thing for a photographer to say, being that I feel like photography has to be so exact sometimes to achieve the desired photo; then, after I thought about it, and after seeing some of her photos where something had gone wrong during the original exposure or the developing or the printing, I saw what she meant. Sometimes the unexpected imperfection is what makes a photo unique and beautiful. It sure worked for a lot of Mann's work. Like this one: