Forecasts vary in horizon, from a few seconds up to a few days in financial markets, compared to from one to several months for macro variables. We have to provide uncertainty intervals around the central forecasts to indicate the extent to which we are unclear about the future.

I tried to develop some theories that took account of the uncertainty in the world and the complexity in the world.

When we step into a new terrain, we experience vast uncertainty. Uncertainty is just a situation that you do not know how to handle.

I believe the most solemn duty of the American president is to protect the American people. If America shows uncertainty and weakness in this decade, the world will drift toward tragedy. This will not happen on my watch.

If we must not act save on a certainty, we ought not to act on religion, for it is not certain. But how many things we do on an uncertainty, sea voyages, battles!

Uncertainty is a sign of humility, and humility is just the ability or the willingness to learn.

Being an actor is just like being any other sort of self-employed person - we're all just happy to have a job in the first place, but we also thrive off the uncertainty of it.

And, frankly, what happens out of Washington is, it creates a wind in my face, uncertainty over Obamacare, uncertainty over their tax policy, uncertainty over the regulatory policy.

Random distributions are not good things, because people are risk-averse, and this risk adversely affects their welfare. If you get too much price uncertainty, all kinds of long-term, mutually beneficial contracts can't be entered into.

Hospitals don't have enough beds, staff shortages are being exacerbated by the uncertainty surrounding what Brexit means for EU nationals and our ability to access new cancer treatments is under threat.

If it is widely assumed that the new President cannot move forward simply because of a narrow victory, there can easily develop a sense of unease and uncertainty, adversely affecting every sector of American society, our economy and the perception of other nations.

The substantial uncertainty about the path of asset price movements going forward necessarily reduces the case for altering policy in advance of the move.

I'm in the camp that needs to discover and take risks, sometimes it's with the promise of something special and new, sometimes it's to stay awake, either way it's much more stressful with all the uncertainty but worth the pain in the end.

If there's one thing that's certain in business, it's uncertainty.

If you think about a business where uncertainty is an anathema, it's around consumer spending, and it's around retail.

U.S. companies need clear guidelines on when they have to turn over electronic communications to law enforcement if that information is stored abroad. The current uncertainty harms U.S. businesses and their customers and does not well-serve our foreign relationships.

The markets don't like instability and they don't like uncertainty.

There is something about the mindset of a scientist that is different - an awareness of uncertainty, modeling, proof.

Uncertainty always creates doubt, and doubt creates fear.

We seek to better integrate Brazil into the world... and eliminate unfair trade practices and uncertainty for foreign trade flows.