Karl Marx

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

"Art is always and everywhere the secret confession, and at the same time the immortal movement of its time."

"It is absolutely impossible to transcend the laws of nature. What can change in historically different circumstances is only the form in which these laws expose themselves."

"Experience praises the most happy the one who made the most people happy."

"Necessity is blind until it becomes conscious. Freedom is the consciousness of necessity."

"The country that is more developed industrially only shows, to the less developed, the image of its own future."