The body is impermanent, it is not a solid entity. It quickly decays. It is a storehouse of afflictions and ill-health. Do not make it a place of absolute refuge. The body is like froth on water. It is not something that can be grasped -From Vimilakirti Sutra (Source: Thich Nhat Hanh, The Bodhisattva Path: Commentary on the Vimalakirtinirdesa and Ugraparitprccha Sutras, p.105).
I like Vimilakirti's comparison of the body to "froth on water", because it evokes a sense of dependence and insubstantiality. Buddhism uses a lot of colorful imagery to describe the body. I have once heard a Dharma teacher compare the human body to the puppet, in which the mind will manipulate the puppet's body. Buddhism also compares the body to a corpse. What can possibly be precious about something that is just a pile of meat and bones? Such a comparison reminds me that all suffering is from the mind. Without the mind, the body could not feel, and we can say that all sense of pain is a hologram or an illusion that starts with the mind. We only then project pain onto an illusory sense of solidity.
What I especially like about the froth metaphor is that it evokes interdependence. A body is always part of a larger body--whether it's nature, society or family. We don't just get hatched into the world from the sky or from a soul. Instead, bodies are nurtured from a series of other bodies, just like concentric circles. Bodies can flicker and fade. When I am ill, I sense a heaviness in my body, as though there were a hole in it where energies get blocked or leak out. Bodies flow or become obstructed but in each case, the body has a kind of liquidity.
Another way of comparing the body is using the five skandhas or "heaps". Each heap represents a different way of being or experiencing the body. Form involves the shapes and physical contours of something, while sensations are felt, and perceptions are our mental impressions. Consciousness can often define our bodies in the context of social images and impressions, and this is where "body shame" or "body pride" might arise. Beauty standards even originate from cultural interpolations of an ideal or healthy body. Each layer of the skandhas creates something new or adds a new dimension to the experience. Yet, the whole experience does not have a singular existence: it doesn't have reality without these different layers. I once compared this to those overlays on an anatomy book, where each "layer" of imagery gets peeled away to reveal a more inward view of the body.
When I think of the body as froth, I am invited to see the body as something that I temporarily use to accomplish things and hopefully uplift others in the process. Just like a pen inscribes words on a page, the body can albeit briefly express some core aspect of Dharma such as wisdom, insight, love, compassion or patience. But it's only temporary: pens run out of ink and the body also runs out of energy as we age.
Just so, when the body-pen runs out of ink, we need to run out and get a new one.