Leon Lederman

"The effort to understand the universe is one of the very few things that lifts human life a little above the level of farce, and gives it some of the grace of tragedy."

"Science is based on experiment, on a willingness to challenge old dogma."

"Imagination is more important than knowledge. Knowledge is limited; imagination embraces the entire world."

"The most important thing is to be curious."

"I believe that every human has a finite number of heartbeats. I don't intend to waste any of mine."

"The universe is a pretty big place. If it's just us, seems like an awful waste of space."

"Courage is not the absence of fear; it is action in the face of fear."

"The great tragedy of science is the slaying of a beautiful hypothesis by an ugly fact."

"Physics is really nothing more than a search for ultimate simplicity."

"One cannot be deeply responsive to the world without being saddened very often."

"The important thing is not to stop questioning."

"Nature speaks to us in a language that we must learn to understand."

"Success is not final, failure is not fatal: it is the courage to continue that counts."

"Time is the fire in which we burn."

"To understand the world, one must observe it carefully and think deeply about what one observes."

"The beauty of a scientific truth is that it does not depend on anybody's opinion."

"We are made of starstuff, considering ourselves."

"Innovation distinguishes between a leader and a follower."

"The pursuit of knowledge is a lifelong journey."

"In science, there are no shortcuts to truth."

"Patience is not simply the ability to wait—it is how we behave while we're waiting."

"The universe is governed by rules, not randomness."

"Great discoveries come to those who persist in asking questions."

"To love is to take the risk of being hurt."

"The greatest gift we can give to others is our attention."

"Dreams are the blueprints of achievement."

"Strength is not about physical power; it's about mental fortitude."

"Fear is the enemy of progress."

"Work done with passion is work that matters."

"Knowledge without action is merely information."