We continually experience activity. The world is always moving and changing. We perceive this movement and change. Maybe we're mesmerised by it. Even when all seems still, it's an illusory stillness, as the world keeps on turning. But this is the reflection of Reality.
In meditation we calm the activity of the body and the mind, but they can never be perfectly still. The body and the activity of the mind belong in the world of movement and change. They can slow down or speed up, but not really stop. In meditation we slow them down. Breathing becomes more relaxed, and mind activity can be settled to a degree. The important thing to realise is that we are not the activity of the body or the mind. We perceive this activity from a placeless place of Stillness.
True Stillness cannot be achieved. Not because it is impossible, but because it is already here. The activity we perceive is a reflection of the Stillness in which it is perceived. The movement of the world appears in the Stillness of Being. All space and time appear Here and Now.
So in meditation we sink back into the true nature of Being. We sink back into the Stillness which perceives the apparent motion of the world. We perceive the breathing and the wandering mind activity. We are not that. We are not moving at all. Our nature is Perfect Peace. Pure Clarity. Let the world turn. Let the mind wander. But know that you are not turning or wandering. You are the Stillness right Here.
There may seem to be a 'me' that moves about or thinks thoughts, but that sense of 'me' is made from thought activity itself. It is also perceived. We are That which perceives any sense of me or other. We perceive the mistaken sense of identity. It doesn't change us. The one who may be mesmerised by the movements and activity of the world is not really who we are. We perceive this 'being mesmerised' or 'being caught up in the world'. The world moving and the thoughts thinking appear within the Stillness of Pure Consciousness.
In the world stillness appears illusory, whereas in Reality movement is illusory. The world appears as a reflection of Reality, yet it is nothing other than Reality. All apparent activity appears within the Non-Activity of Stillness, the nature of Perfect Peace, which is the heart of all and the whole of all.