I really do feel like the latter Wheel of Time books start hitting a certain form of "epic"--what I like to call "one-world epic" (as opposed to "planar epic"). You have major characters who either actually did live in the Age of Legends and can do all sorts of crazy she-it, or who are reincarnations of those past lives. You have people whose magic potential is quite literally 'off the charts,' and not all of it is 'I am a font of insanely enormous power,' e.g. the guy who can open portals like nobody's business but whose other magic is weak. Rand using the Choeden Kal to cleanse saidin was a first taste of Epic, as was Perrin participating in/directing the creation of Mah'alleinir. By the last book, you have people teleporting across the world regularly, vast armies of light and darkness, and an actual debate between (essentially) Magical Jesus and Fantasy Satan, in a place that is literally external to reality. It's not the "Galaxies and Godwars" style of "epic" play, but for a campaign that began by a gaggle of unlettered teenagers taking a road trip with a sorceress and her fighter friend, it seems "epic" enough to me.
As for "pithy"...
"Every adventure should leave your players terrified, elated, or amazed. Preferably all three."