Art is never finished, only abandoned. - Leonardo da Vinci Click To Tweet Insanity: doing the same thing over and over again and expecting different results. - Albert Einstein Click To Tweet I can calculate the motion of heavenly bodies, but not the madness of people. - Isaac Newton Click To Tweet You must be ready to give up even the most attractive ideas when experiment shows them to be wrong. - Alessandro Volta Click To Tweet UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity. - Dennis Ritchie Click To Tweet It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge. - Enrico Fermi Click To Tweet That's one small step for a man, one giant leap for mankind. - Neil Alden Armstrong Click To Tweet Be less curious about people and more curious about ideas. - Marie Curie Click To Tweet When one door closes another door opens; but we so often look so long and so regretfully upon the closed door, that we do not see the ones which open for us. - Alexander Graham Bell Click To Tweet There never was a good war or a bad peace. - Benjamin Franklin Click To Tweet Everything we call real is made of things that cannot be regarded as real. - Niels Bohr Click To Tweet Following the light of the sun, we left the Old World. - Christopher Columbus Click To Tweet I have not failed. I've just found 10,000 ways that won't work. - Thomas Alva Edison Click To Tweet You cannot teach a man anything; you can only help him find it within himself. - Galileo Galilei Click To Tweet The pure culture is the foundation for all research on infectious disease. - Robert Koch Click To Tweet In the new era, thought itself will be transmitted by radio. - Guglielmo Marconi Click To Tweet In the fields of observation chance favors only the prepared mind. - Louis Pasteur Click To Tweet True greatness is when your name is like ampere, watt, and fourier—when it's spelled with a lower case letter. - James Watt Click To Tweet International language of the forthcoming generations will be solely and by necessity only a language of art. - Ludwik Lejzer Zamenhof Click To Tweet I was captured for life by chemistry and by crystals. - Dorothy Hodgkin Click To Tweet Time does not wait ; do not spend it on waiting. - Judith Resnik Click To Tweet If we die, we want people to accept it. We are in a risky business, and we hope that if anything happens to us, it will not delay the program. The conquest of space is worth the risk of life. - Gus Grissom Click To Tweet It's a very sobering feeling to be up in space and realize that one's safety factor was determined by the lowest bidder on a government contract. - Alan Shepard Click To Tweet The route to the target is more important than the target. We are going to go for the target, but we enjoy the route as well. - Ilan Ramon Click To Tweet The president felt that it was important to send an ordinary citizen to experience the excitement of space travel as a representative for all Americans. - Christa McAuliffe Click To Tweet Life science research can be done on multiple platforms. Since we have a very small number of people flying into space, the more people you have, the better. - Laurel Clark Click To Tweet The path from dreams to success does exist. May you have the vision to find it, the courage to get on to it, and the perseverance to follow it. Wishing you a great journey. - Kalpana Chawla Click To Tweet Whether or not you reach your goals in life depends entirely on how well you prepare for them and how badly you want them. - Ronald McNair Click To Tweet Intelligence is the ability to adapt to change. - Stephen Hawking Click To Tweet