henad

We are certainly not compelled to attach that one henad to some one thing and so deprive all the rest of the means to unity: since every existent must be one thing, the unity is obviously common to all.

The Six Enneads. Plotinus 1952

Supposing that first henad alone to exist, it must obviously be lodged either in the thing of completest Being or at all events in the thing most completely a unity.

The Six Enneads. Plotinus 1952

If that first henad is to be taken as lodged in the thing of completest unity, there is the question why that most perfect unity should require the first henad to give it unity.

The Six Enneads. Plotinus 1952

If in the thing of completest Being, then the other henads are but nominal and cannot be ranked with the first henad, or else

The Six Enneads. Plotinus 1952

It may be suggested that the decad is nothing more than so many henads; admitting the one henad why should we reject the ten?

The Six Enneads. Plotinus 1952

But if a henad exists in some given object and further is observed in something else, then that first henad being real, there cannot be only one henad in existence; there must be a multiplicity of henads.

The Six Enneads. Plotinus 1952