I'm blocked because I refuse to seriously consider anyone else's point of view. I'm the only one who really sees the whole picture, and therefore I'm right. And other people are blocked because they lose the energy to fight, to stand up for what they believe in. They become weary and disillusioned and unable to face the constant hassle. And between us, we make quite sure God is unable to reach us.
Pride is a very effective barrier.
It keeps God out as well as other people. And pride has many disguises. Sometimes those disguises are twisted and inverted in a kind of false humility. Perhaps in a refusal to step forward and volunteer for anything in case I'm seen as blowing my own trumpet. Or in a refusal to take any kind of risk in case I make a fool of myself.