Following quotes are both arguments or opinions on ‘what time is.’
Although it is a common-sense that time seems to flow straightforwardly from the past to the future, people who try to explain complex sciences such as the String Theory may disagree with such a simple explanation. For example, Bryanton mentions on this topic in a video attempting to explain the dimensions, from zero to tenth, in accordance with the String theory:
‘If we think of ourselves as we were one minute ago, and then imagine ourselves as we are at this moment, the line we could draw from the ‘one-minute-ago version’ to the ‘right now version’ would be a line in the fourth dimension. If you were to see your body in the fourth dimension, you would be like a long undulating snake, with your embryonic self at one end and your deceased self at the other.
… One of the most intriguing aspects of there being one dimension stacked on another is that down here in the dimensions below we can be unaware of our motion in the dimensions above…
… time (is)… actually twisting and turning in the dimension above. So, the long undulating snake, that is us, will feel like it is moving in a straight line in the forth dimension, but there will actually be, in the fifth dimension, a multitude of paths that we could branch to at any given moment. Those branches will be influenced by our own choice, chance and actions of others.
.. What if you wanted to go back into your own childhood and visit yourself. We can imagine folding the fourth dimension through the fifth, jumping back through time and space to get there… We can imagine our fourth-dimensional selves branching out from our current moment into the fifth dimension… The shortcut we could take would involve us folding the fifth dimension through the sixth dimension, which allows us to instantly jump from our current position to a different fifth dimensional line.
… In our description of the fourth dimension, we imagined taking the dimension below and conceiving of it as a single point. The fourth dimension is a line, which can join the universe as it was one minute ago to the universe as it is right now.’ (http://www.tenthdimension.com/medialinks.php)
In the mean time, literature treats time as one of the most fascinating sources for many authors’ imaginations. However passionately science tries to point out its possibility, actually, time travelling is only available within the extent of fictional stories so far. Authors can use, or even create, the concept of time freely as their stories require. Moreover, authors can philosophise the concept of time as groundwork for their own creations as well. For example, Thomas Mann summarises his opinions on the concept of time, relating to his creation of a story in its Foreword as following:
‘The story of Hans Castorp… belongs to the long ago; is already, so to speak, covered with historic mould, and unquestionably to be presented in the tense best suited to a narrative out of the depth of the past…
In a word, the degree of its antiquity has noways to do with the passage of time — in which statement the author intentionally touches upon the strange and questionable double nature of that riddling element.
But we would not willfully obscure a plain matter. The exaggerated pastness of our narrative is due to its taking place before the epoch when a certain crisis shattered its way through life and consciousness and left a deep chasm behind. It takes place — or rather, deliberately to avoid the present tense, it took place, and had taken place — in that long ago, in that old days, the days of the world before the Great War, in the beginning of which so much began that has scarcely yet left off beginning. Yes, it took place before that; yet not so long before. Is not the pastness of the past the profounder, the completer, the more legendary, the more immediately before the present it falls? More than that, our story has, of its own nature, something of the legend about it now and again.’ ( http://prosaicbytrinath.blogspot.com/2010/12/foreword-to-magic-mountain-thomas-mann.html)
Thus, it would be safe to conclude that a concept of time depends on how each one conceives it.
Reference:
Bryanton, Rob (2006), Imagining the Tenth Dimension (annotated) (electrically accessed 11/05/2011)
http://www.tenthdimension.com/medialinks.php
Prosaic (2010), Foreword to Magic Mountain, Thomas Mann (posted by Trinath Gaduparthi 01/12/2010, electrically accessed 09/05/2011)
http://prosaicbytrinath.blogspot.com/2010/12/foreword-to-magic-mountain-thomas-mann.html