Ego is the basic problem, the most basic. And unless you solve it, nothing is solved. Unless ego disappears, the ultimate cannot penetrate you.
The ego is like a closed door. The guest is standing outside; the guest has been knocking, but the door is closed. Not only is the door closed, but the ego goes on interpreting. It says: there is nobody outside, no guest has come, nobody has knocked, just a strong wind is knocking at the door. It goes on interpreting from the inside without looking at the fact. And the door remains closed. By interpretations, even the possibility of its opening becomes less and less. And a moment comes when you are completely closed in your own ego. Then all sensitivity is lost. Then you are not an opening, and you cannot have a meeting with existence. Then you are almost dead. The ego becomes your grave.
This is the most basic problem. If you solve it, everything is solved. There is no need to seek God. There is no need to seek truth. ----OSHO