The first epics were intended for recitation; the literary epic is meant to be read.
No poet will ever take the written word as a substitute for the spoken word; he knows that it is on the spoken word, and the spoken word only, that his art is founded.
The Border Ballads, for instance, and the Robin Hood Ballads, clearly suppose a state of society which is nothing but a very circumscribed and not very important heroic age.
But the gravest difficulty, and perhaps the most important, in poetry meant solely for recitation, is the difficulty of achieving verbal beauty, or rather of making verbal beauty tell.
There is only one thing which can master the perplexed stuff of epic material into unity; and that is, an ability to see in particular human experience some significant symbolism of man's general destiny.
The epic poet has behind him a tradition of matter and a tradition of style; and that is what every other poet has behind him too; only, for the epic poet, tradition is rather narrower, rather more strictly compelling.