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 (1818-1883) German philosopher and political economist.
There are two things to be considered with regard to any scheme. In the first place, ''Is it good in itself?'' In the second, ''Can it be easily put into practice?''
Jean Jacques Rousseau (1712-1778) Swiss political philosopher and essayist.