Watching the Doodle of August 17, 2011, I 'stumbled' with Fermat's Last Theorem and also with something Fermat said:
"it is impossible to separate a cube into two cubes, or a fourth power into two fourth powers, or in general, any power higher than the second, into two like powers. 'I have discovered a truly marvelous proof of this, which this margin is too narrow to contain.' "
And then, I 'stumbled' with Andrew Wiles and also with something he said that I feel I will try to remember forever, because I like it:
That is the way I like to look at optimism, positivism, inspiration and motivation: never pull mistakes out of the equation!!
PS: Wiles' quote moves me to play Luiggi's Mansion... :-P