There is a place where time stands still.

…one sees parents clutching their children, in a frozen embrace that will never let go. The beautiful young daughter with blue eyes and blond hair will never stop smiling the smile she smiles now, will never lose this soft pink glow on her cheeks, will never grow wrinkled or tired, will never get injured, will never unlearn what her parents have taught her, will never think thoughts that her parents don’t know, will never know evil, will never tell her parents that she does not love them, will never leave her room with the view of the ocean, will never stop touching her parents as she does now.

Some say it is best not to go near the center of time. Life is a vessel of sadness, but it is noble to live life, and without time there is no life. Others disagree. They would rather have an eternity of contentment, even if that eternity were fixed and frozen, like a butterfly mounted in a case.

Alan Lightman, Einstein's Dreams

In this world, time flows backward.

A man stands at the graveside of his friend, throws a handful of dirt on the coffin, feels the cold April rain on his face. But he does not weep. He looks ahead to the day when his friend’s lungs will be strong, when his friend will be out of his bed and laughing, when the two of them will drink ale together, go sailing, talk. He does not weep. He waits longingly for a particular day he remembers in the future when he and his friend will have sandwiches on a low flat table, when he will describe his fear of growing old and unloved and his friend will nod gently, when the rain will slide down the glass of the window.

Alan Lightman, Einstein's Dreams

Consider a world in which cause and effect are erratic.

Most people have learned how to live in the moment. The argument goes that if the past has uncertain effect on the present, there is no need to dwell on the past. And if the present has little effect on the future, present actions need not be weighed for their consequence. Rather, each act is an island in time, to be judged on its own. Families comfort a dying uncle not because of a likely inheritance, but because he is loved at that moment. Employees are hired not because of their résumés, but because of their good sense in interviews. Clerks trampled by their bosses fight back at each insult, with no fear for their future. It is a world of impulse. It is a world of sincerity. It is a world in which every word spoken speaks just to that moment, every glace given has only one meaning, each touch has no past or no future, each kiss is a kiss of immediacy.

Alan Lightman, Einstein's Dreams