I believe that the best writing comes from deep belief, sincere passion, and a strong connective tissue between the writer and the written. These qualities allow great writing to transcend the particular time of its creation.
A writer suffering deep loss, of a child or spouse, will put that loss into the words of a poem or story. It is an intimate loss to him, but it is also a common experience, a shared sadness among other human beings. He will articulate the loss, others will read and identify with his words, the poem or story will always be his but will also become an independent identity in many ways. It will outlive him, or keep him alive, in coming centuries depending on your view. It has its own permanence.
This permanence, or legacy, is part of arts truth, so to speak. Most people can name a few classic writers and artists without great trouble (Shakespeare, Hemingway, Van Gogh, Rembrandt), but how many could name current artists? Very few could name the current Poet Laureate or a current popular painter. Artists understand, to some degree, that their work may well have more meaning and be worth more value in the future. A writer writes now with an eye focused a decade away. An artist creates now with the understanding that his canvass is more permanent than himself.
The artist is a creator. He excavates his emotional soul and pours deep truths onto the waiting page or canvass; he dissects and maneuvers the universal realities he sees as he lives, recasting and reworking them into a timelessness that becomes art. This art becomes a flexible representation of the universal passion of humanity and endures because of that kinship. He creates a legacy, an oeuvre, for himself that will eventually be all that remains.
Art is steeped in the history of it’s time of creation to some degree, but that is more reference point than anything else. The language, dress, and backgrounds’ may change, but the faces and voices are timeless. Eyes look out hauntingly with fear or joy, action takes place with a certain tone or with laughter. The experience is universally human regardless of the time period.