"[I can't start the day without] checking my cellphone... I love messages!"

“Americans are so dedicated to their jobs.”

“In geometry I find certain imperfections which I hold to be the reason why this science, apart from transition into analytics, can as yet make no advance from that state in which it came to us from Euclid. As belonging to these imperfections, I consider the obscurity in the fundamental concepts of the geometrical magnitudes and in the manner and method of representing the measuring of these magnitudes, and finally the momentous gap in the theory of parallels, to fill which all efforts of mathematicians have so far been in vain.”

“It is my greatest wish to enable our people to live with nothing to envy at the earliest possible date, and it is my greatest pleasure to work energetically, sharing my joys and sorrows with our people, on the road of translating my wish into reality.”

Source : Response to questions from Russia's ITAR-TASS news agency, October 13, 2011.

“I have a theory that since everyone is always dieting, no one at a convention dinner ever eats the potatoes. Therefore, they go back to the kitchen uneaten. And the next night they reappear at another convention. Therefore, one should never eat the potatoes. Who knows? They may be six or seven years old.”

“Of two Evils we take the less.”

Source : Richard Hooker, Izaak Walton, Walter Travers (1825). “The Works of Mr. Richard Hooker;: With a General Index: Also, Mr. Isaac Walton's Life of the Author”, p.131

“My work is getting stronger & stronger and more intense all the time.... I have such a rush of new energy & notions coming into my head, over my horizon like chariots of fire that all I want is freedom to step aside and execute them.”

“In the end, leaders are defined by the convictions they hold.”

Source : Presidential Library Dedication Address, delivered 25 April 2013, Southern Methodist University, Dallas, Texas

“I'm always gonna be all over my CD the most, of course. My talent is my talent. I ain't really tripping off no ego; I just like to make good music with good people.”