Quote by Karl Marx

"The philosophers have only interpreted the world in various ways; the point is to change it."

"Workers of the world, unite; you have nothing to lose but your chains."

"The ruling ideas of each age have ever been the ideas of its ruling class."

"Religion is the opium of the people."

"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."