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

Free education for all children in public schools... Combination of education with industrial production

Scientific truth is always paradox, if judged by everyday experience, which catches only the delusive appearance of things.

The criticism of Religion is the beginning of all criticism

Society does not consist of individuals but expresses the sum of interrelations, the relations within which these individuals stand.

Religion is the opium of the masses.

...the Communists everywhere support every revolutionary movement against the existing social and political order of things... They openly declare that their ends can be attained only by the forcible overthrow of all existing social conditions.