Remember, not concentrating but just remaining alert, just a slight alertness. Look at the tip of the nose and remain slightly alert to the third eye. In fact, the moment you look at the tip of the nose you will become alert to the third eye, because that is the other pole of the nose. One pole, the outer pole, is the tip, the end; the other end of the nose is joined with the third eye. The moment you become aware of the tip you will suddenly become aware of the other end too. But just remain aware, effortlessly aware. You need not be worried. Just open the window and wait. Light is such a moving phenomenon that if the window is open it is going to move in. In fact, it has been knocking on the window for many many lives, but the window has not opened and it cannot force it open.