I have learned to use the word impossible with the greatest caution. Wernher von Braun
Impossible is a word only to be found in the dictionary of fools. Napoleon Bonaparte
The only way to discover the limits of the possible is to go beyond them into the impossible. Arthur C. Clarke
When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong. Arthur C. Clarke
It is the act of a madman to pursue impossibilities. Marcus Aurelius
Most people who succeed in the face of seemingly impossible conditions are people who simply don’t know how to quit. Robert Schuller
Man is the only creature that strives to surpass himself, and yearns for the impossible. Eric Hoffer
Few things are impossible to diligence and skill. Samuel Johnson
It’s kind of fun to do the impossible. Walt Disney
I love those who yearn for the impossible. Johann Wolfgang von Goethe
There is no use trying, said Alice; one can’t believe impossible things. I dare say you haven’t had much practice, said the Queen. When I was your age, I always did it for half an hour a day. Why, sometimes I’ve believed as many as six impossible things before breakfast. Lewis Carroll
Some of the world’s greatest feats were accomplished by people not smart enough to know they were impossible. Doug Larson