Goodness is the highest ethical virtue and is of right action
The Beautiful is aesthetic, art, poetry, perfection of harmony of expresssion
The True is the scientific knowledge of Reality, of the Universe, of Life
As opposed to: “The bad, the ugly & the false”
"Socrates therefore in that dialogue, being inspired by the Nymphs, celebrates every thing divine as beautiful, wise and good, and says that by these the soul is nourished. But if every thing divine is a thing of this kind, this is the case with the intelligible by a much greater priority. And all these indeed are every where, but in the first triad, the good principally subsists; in the second the wise; and in the third the beautiful. For in this there is the most beautiful of intelligibles. But in the second triad truth and the first intelligence subsist. And in the first there is the commensurate, which we say is the same as the good." - Proclus, On The Theology of Plato