As soon as I began, it seemed impossible to write fast enough - I wrote faster than I would write a letter - two thousand to three thousand words in a morning, and I cannot help it.

— Helen Hunt Jackson

As soon as war is declared it will be impossible to hold the poets back. Rhyme is still the most effective drum.

— Jean Giraudoux

At first, dreams seem impossible, then improbable, and eventually inevitable.

— Christopher Reeve

Because the truth is, today's immigrants, as they have for generation after generation, work the longest hours at the hardest jobs for the lowest pay, jobs that are just about impossible to fill.

— Luis Gutierrez

But it is impossible to divide a cube into two cubes, or a fourth power into fourth powers, or generally any power beyond the square into like powers; of this I have found a remarkable demonstration. This margin is too narrow to contain it.

— Pierre de Fermat

But on second thought, after I decreed the state of emergency, I came to the conclusion that that was impossible to achieve without bloodshed because the street protesters were full of anger and nearly out of control. This is why I thought we needed to find another way out.

— Eduard Shevardnadze

Effectively, change is almost impossible without industry-wide collaboration, cooperation and consensus.

— Simon Mainwaring

Environmental scientists in Canada said it was impossible for me to get to the Pole in 2004... I said 'no,' it's still OK, and I can still get there, and I did.

— Ben Saunders

Envy blinds men and makes it impossible for them to think clearly.

— Malcolm X

Even if it turns out that time travel is impossible, it is important that we understand why it is impossible.

— Stephen Hawking