This famous vedic saying can be translated as
"Although I'm such a pin-head, I'm just like the whole Universe and beyond (Brahman),
or "As is the individual, so is the universe, as is the universe, so is the individual",
such as "As is the atom, so is the Universe"
or "As is the human body, so is the Cosmic Body"
or "As is the Microcosm, so is the Macrocosm",
or succinctly as "As Above, So Below".
The symbolic equivalence of microcosm of Jivapurusha and Kalapurusha can be treated as conformity of the individual body to the cosmic body. According to this, a human being is a mirroring of the universe.The structure of the body reflects the structure of the cosmos, so that one could pass from one to the other and find corresponding parts and functions. It is possible to open all stratifications of the world, all structure of the world in the person and all event in this person can have world value and can be reflected in space. It is deeply opposite to that psychologism which sees in the person the closed individual being, a fractional part of the world. The person not a fractional part of the Universe, not its splinter, and the whole small Universe including all qualities of the big Universe. The macrocosm-microcosm theory lies at the core of correlative cosmology. The subject is visible in object and object – in the subject. So, we have two processes: the first is a hierarchical cosmology in which lower levels emerge from higher and the second, the body becomes a cosmography, a writing of the cosmos. According to Tantrism, the practitioner can meditate on his own body through the corporeal manifestation of the Purusha, identifying the different points wherein the body corresponds with the cosmos. For example, the tantric meditation is reflected in the "Hymn to the Circle of Deities Situated in the Body" of Abhinavagupta.
Indeed, there are different levels of revelation linked to different levels of understanding, which are further linked to the levels of a hierarchical cosmos. But we are not isolated, separate beings. This separation is an illusion. We form part of the network that has no beginning and no end. As is the body, so is the universe.
OM NAMAH SHIVAYA