The writer must earn money in order to be able to live and to write, but he must by no means live and write for the purpose of making money. – Karl Marx
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. – Karl Marx
It is not history which uses men as a means of achieving – as if it were an individual person – its own ends. History is nothing but the activity of men in pursuit of their ends. – Karl Marx
Mankind always sets itself only such tasks as it can solve; since, looking at the matter more closely, we will always find that the task itself arises only when the material conditions necessary for its solution already exist or are at least in the process of formation. – Karl Marx