situation which involves imperfect and/or unknown information, regarding the existing state, environment, a future outcome or more than one possible outcomes From Wikiquote, the free quote compendium
Uncertainty is a term used in subtly different ways in a wide number of fields, including physics, philosophy, statistics, economics, finance, insurance, psychology, sociology, engineering, and information science. It applies to predictions of future events, to physical measurements already made, or to the unknown.
If you aren’t in the moment, you are either looking forward to uncertainty, or back to pain and regret.
There's no earthly way of knowing Which direction we are going There's no knowing where we're rowing Or which way the river's flowing Is it raining? Is it snowing? Is a hurricane a-blowing? Not a speck of light is showing So the danger must be growing Are the fires of hell a-glowing? Is the grisly reaper mowing? Yes, the danger must be growing 'Cause the rowers keep on rowing And they're certainly not showing Any signs that they are slowing!
From that point, my universe went on crumbling; new cracks appeared all the time. I could see that the pleasant securities of childhood, all of those warm little human emotions, all of those trivial aims and purposes that we allow to rule our lives, were an illusion. We were like sheep munching grass, unaware that the butcher's lorry is already on its way. I got used to living with a deep, underlying feeling of uncertainty that no one around me seemed to share. It was rather like living on death row.