This is a good meditation practice that teaches us to be mindful of the workings of our six sense bases. Our six sense bases (eye, ear, nose, tongue, body, mind) allow us to function our physical bodies to respond to external stimuli. Many of us are very fortunate to have a healthy body with proper functioning of our sense bases. However, many of us if not mindful, will be carried away by the sequence of events whenever any of our sense bases are activated by whatever external stimuli in the environment. For example, we see many things (external forms - sight) with our eyes, we can be alert (eye consciousness) but might not register any attention until someone or something catches our eyes, (eye contact) which results in a feeling as a result of the eye contact (which can either be pleasant, unpleasant or neutral). But if we continue to like or dislike what we see, it will lead to craving (desire) or aversion. Now this is suffering because this will eventually lead to dissatisfaction. Therefore to combat this situation, we will need to understand that all things are subject to the three universal characteristics - impermanence, unsatisfactory nature, and non-self (as this body is not you). And because this body is not you, this body is not me, not mine, and not myself. Then we are able to develop this wisdom not to hold on to anything. and learn to let go,
