In The Achievement of T. S. Eliot (Oxford University Press, New York, p. 107), F. O. Matthiessen writes:
The value of the tragic writer has always lain in the uncompromising honesty with which he has cut through appearances to face the real conditions of man’s lot, in his refusal to be deceived by an easy answer, in the unflinching, if agonized, expression of what he takes to be true. The effect of such integrity is not to oppress the reader with a sense of burdens too great to be borne, but to bring him some release. For, if it is part of the function of every great artist to transform his age, the tragic writer does so not by delivering an abstract realization of life, but by giving to the people who live in the age a full reading of its weakness and horror; yet, concurrently, by revealing some enduring potentiality of good to be embraced with courage and with an ecstatic sense of its transfiguring glory. Through the completeness of his portrayal of the almost insupportable conditions of human existence, he frees his audience from the oppression of fear; and stirring them to new heart by the presentation of a heroic struggle against odds, he also enables them to conceive anew the means of sustaining and improving their own lives. Only thus can he communicate both ‘the horror’ and ‘the glory.’
These remarks by Matthiessen express quite succinctly, I think, the heart of the best possible response to the charge that the ‘tragic’ or ‘absurdist’ or ‘existential’ attitude leads invariably to nihilism. (It is visible quite clearly, for instance, in Nietzsche’s amor fati, in his ‘joyful pessimism,’ in his rejection of Schopenhauer‘s grim view of the insatiable will: the unflinching life is only possible if imbued with a refusal to look away from the particulars of our lot; it may be seen too, in Sartre‘s ‘Existentialism is a Humanism.’) The ‘heroic struggle against odds,’ the ‘ecstatic sense,’ ‘the transfiguring glory,’ that is present in the tragic writer’s vision of life suggests that there is a romanticism here too, one that will not be satisfied with the easy consolations to be found in systems that explain all, in ‘abstract realizations’ that render everything reasonable and comprehensible.
The tragic writer brings a new mythology to life, placing by dint of artful location, the reader at its center (you may, if you like, cast your mind back to Joseph Campbell at this point); our onward journey now bears the possibility of meaning, because we venture forth into physical and psychic landscapes that await our presence and interaction with them for further definition and clarification. This world is not ready-made, oppressing us with the burden of matters predetermined and foretold; it awaits ‘completion’ at our hands. And that notion of the self as creator, of itself, of the world around it, is the tragic writer’s greatest value; if he or she displaces divinity from the world, it is only to place it within us.