"Imagination is more important than knowledge."-Einstein
"In rivers, the water that you touch is the last of what has passed and the first of that which comes; so with present time." -Leonardo da Vinci
"A person starts to live when he can live outside himself." -Einstein
“You cannot teach a man anything; you can only help him discover it in himself.” -Galileo
“The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the Universe to do.” - Galileo
"An investment in knowledge pays the best interest." -Benjamin Franklin
"An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men." -Charles Darwin
"A true friend is one soul in two bodies." -Aristotle
"He who is fixed to a star does not change his mind." -Leonardo da Vinci
“If I have seen further than others, it is by standing upon the shoulders of giants.” -Isaac Newton
collected from-http://timehuman.blogspot.com/2010/05/greatest-scientist-quotes.html