Explanation 1 · Principles of Creation

These vowels go beyond the simple harmony expressed by
    the basic vowels ㅗ ㅏ ㅜ ㅓ(o a u eo), which symbolize the
    natural interaction of Heaven and Earth.
    By adding ㅣ(i) Human, they represent the principle of
    change and transformation brought about by Human
    intervention.


    Creation and recreation

    In the vowels ㅗ ㅏㅜ ㅓ, a single round dot (ㆍ) symbolizes
    Heaven. The presence of one dot signifies that these sounds
    originated from the union of Heaven and Earth, marking the
    first sounds ever created. This represents creation, as these
    vowels embody the initial harmony between Heaven and
    Earth.
    In contrast, in the vowels ㅛ ㅑ ㅠ ㅕ(yo ya yu yeo), there
    are two round dots (ㆍㆍ). This indicates that these sounds are
    either secondarily formed or reborn, signifying re-creation.
    These vowels emerge with the addition of the role of Human
    ㅣ, reflecting an evolution from the original sounds through
    human interaction.




    Principles of creation - Medial vowels                          119