Meditation is totally different. When you concentrate you close your mind to everything else. Meditation means just an openness, a relaxed openness. It is not concentration. While listening to me you are listening to the birds singing in the trees too. The wind passing through the trees singing its song - you are open to it too. The aeroplane passing by, or the train - you are open to it too. This is meditation - you are simply open, available, conscious, available, all doors are open.