In Taoism and Zen Buddhism you time after time hear the statement about emptying out the mind.
To empty out the mind means, that you are emptying it for its content.
The content of the mind is the known, your perspective of life, your historical limitation, the past which projects ifself into the future, the past and the future which sucks life out of the present and transforms memories and plans into reality, and reality into emptiness.
In this way the mind, or the Ego, makes ifself independent in relation to your reality, and the reason is lost.
To empty out the mind is the opposite movement. You give life back to the present, you are emptying the mind and are filling reality with vitality and urge to live.
In this way the mind becomes one with your reality, and the reason is won.