One of the things her biographer is talking about is that she would teach about positive and negative Christianity. In negative Christianity you are separating yourself from the world. In positive Christianity you separate yourself onto God. For me it goes back (in some ways) to the difference between being naive and being pure. We want our children and ourselves to be pure- to be aware of what is out there but choosing what God has for us.
Here is a quote to that effect:
"Many Christians," she says, "put the emphasis on putting up fences to keep people out of the world, instead of putting up bridges to bring people unto God. If you separate Christians from the world but give them no promised land to possess, they will wander around in the wilderness having nothing — nothing from the world and nothing from the Lord."Amen! I am going to read the rest of the biography now and I'll let you know what other gems she has in there.