Just for future reference, those are known as
crepuscular rays.
Enhancing them is the same proposition as enhancing almost any other faint feature;
managing contrast. Here you do not have strong enough rays to create the -voice of gods- effect you may want. You need more humidity (or pollution). But contrast is the property you want to adjust in the areas of the rays, either using a generalized contrast mask or a duplicate background layer featuring a local constrast adjustment (called "Clarity" in today's tools). The latter would be a far better surgical instrument.
But, again, you don't have quite enough to work with here to see voices in the sky. ;-)
Addendum:
Here's a Google image search for "crepuscular rays". They're all pretty corny but you can see the impact of contrast (not that any of these were really edited carefully).
Little tip: The impact of devices like crepuscular rays, sunset/rise halos, and other atmospheric phenomena is strongest when it provides a backdrop to something interesting. If, for example, there was something interesting happening on that enormous beach foreground in your image. A nude figure rim-lit by the sunset. A group around a beach campfire. A sand sculpture. A stray dog relieving himself. Anything! ;-)