Quote by Brian Greene

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

"String theory envisions a universe in which there are more dimensions than the four we observe."

"Physics is really nothing more than a search for ultimate simplicity, but so far all we've found is ultimate complexity."

"The universe doesn't owe us comprehensibility."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."