As he says, not a bad summary of the teaching of the early Fathers.
The problem we have is that explanations like this are hard for the quasi-scientific mindset which governs the way most people think in our culture. We have, by and large, bought into the idea that we can discover how things work by taking them to pieces and looking at the constituent parts. This reductionism is quite un-Christian. God is not a machine that can be disassembled, nor even a creature that can be dissected so we can see all His parts. He is Mystery.
Christians are often reductionists too, and find it hard to accept mystery. This is what leads to bizarre sermon illustrations of the kind that Vic describes, which only serve to give false impressions of what God is like and then confuse people even more. God isn't an ice cube, a candle, or a spiritual Clark Kent/Superman duo, he is Father, Son and Holy Spirit.
The best explanation I know of the Trinity is that this is the way we experience God. We know the care of a generous Creator (Father), the grace of a loving Saviour (Son), and the power and presence of a constant Guide (Spirit). Thus the Trinity is a way of expressing the reality that we experience, rather than an abstract philosophical debate. We "get it" when we open our minds to the full reality of who God is, rather than trying to reduce him to little symbols.