I found an article on Goodness, Beauty and Truth by Andrew Fellows of L’Abri that gives in written form the same argument as a L’Abri lecture of the same title that has had a big influence on the way I think. Well worth a read! An extract from the introduction:

Goodness, Beauty and Truth, I call this the ancient triad. The classical culture of Greek civilisation called this the triumvirate. It’s interesting to see this triad existed in other civilisations. There is something Trinitarian in the function of these three, existing together as one. They seem to belong together, just like an American BLT (bacon, lettuce, tomato) sandwich… This loss of Goodness, Beauty and Truth in the larger sense signals the demise of Western civilisation, for without acknowledging them as larger realities it is impossible to sustain human society.