… The meditator whose mind is centered on his own working of the meditation technique is like the karate pupil who want to cut through a brick with a single blow of the outside edge of the hand and who fixes his mind on the brick. This is a mistake. But the meditator who fixes his mind on the Overself is like the pupil who concentrates his thought on the ground below the brick itself, and this is what leads to success. Obviously, such advice is not suited to the early or elementary stages of meditation where concentration is required. On the contrary, it belongs to the more advanced stage where success comes not from trying but from letting go, relaxing.
Source: The Notebooks of Paul Brunton