Quote by Upton Sinclair

"It is difficult to get a man to understand something, when his salary depends on his not understanding it."

"The American system of ours gives each and every one of us a great opportunity."

"There is one thing that the American people always rise up and do--when they get ready."

"I am nothing in this world but a writing machine."

"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."