Truth, beauty, and goodness are qualities of divinity. At the same time, they are qualities that we can live. They infuse the nitty-gritty of our everyday existence. Living these values does not turn us into God, but they represent what we can comprehend of God. Everyone, whether religious or not, has tasted supreme truth, beauty, and goodness at one time or another.
Consider the alternatives. Who would not prefer a life based on truth? Sensitive to beauty? Dominated by goodness? To cultivate that takes a philosophy of living. How does character grow? It is not particularly a self-conscious and deliberate affair. Why does love grow as we pursue truth, beauty, and goodness?