Everything has a purpose. Walls are walls. Doors are doors. Don't confuse them & You'll do fine.
"What are You talking about Mark?" Let me explain.
Everything in life has a purpose - it's just easier to tell with some things. When we confuse the purpose or don't search for the purpose of things in our lives we make our journey much more challenging than it already will be (Yes life is challenging - if it weren't You'd be dead).
When we come upon doors, even closed ones and act like they are walls, we miss (or put off) the opportunity to learn, grow and progress. When we come upon walls and try to walk through them, we...well, have You ever tried to run through a brick wall? Hurts doesn't it? And chances are You don't get very far (even if You are built like the hulk). Get it?
As I said, everything has a purpose. Walls are walls. Doors are doors. Don't
confuse them & You'll do fine... Now windows? That's for the advanced