The Buddha taught to meditate reciting ''Buddho'' as a way to apply the mind. When you consciously apply the mind to an object, it wakes up. The awareness wakes it up. Once this knowing has arisen through meditation, you can see the mind clearly. As long as the mind remains without the awareness of ''Buddho'', even if there is ordinary worldly mindfulness present, it is as if unawakened and without insight. It will not lead you to what is truly beneficial. Sati or mindfulness depends on the presence of ''Buddho'' - the knowing. It must be a clear knowing, which leads to the mind becoming brighter and more radiant. The illuminating effect that this clear knowing has on the mind is similar to the brightening of a light in a darkened room.