Il n'est pas certain que tout soit incertain.
(Translation: It is not certain that everything is uncertain.)

The heart has its reasons which reason knows not.

We sail within a vast sphere, ever drifting in uncertainty, driven from end to end.

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!

The market is building in a risk premium because of the uncertainty surrounding the election -- once we get that out of the way, all other things being equal, the euro will probably bounce.

There's uncertainty within the insurance industry, as companies are currently unwilling to take the risk of another company's business and infrastructure. There also have been plenty of rate increases, so there is not as much pressure to grow through acquisition.