Religion is the opium of the masses.

In the domain of Political Economy, free scientific inquiry meets not merely the same enemies as in all other domains. The peculiar nature of the material it deals with, summons as foes into the field of battle the most violent, mean and malignant passions of the human breast, the Furies of private interest.

There is one great fact, characteristic of this our nineteenth century, a fact which no party dares deny. On the one hand, there have started into life industrial and scientific forces which no epoch of former human history had ever suspected. On the other hand, there exist symptoms of decay, far surpassing the horrors recorded of the latter times of the Roman empire. In our days everything seems pregnant with its contrary.

The social revolution...cannot draw its poetry from the past, but only from the future. It cannot begin with itself before it has stripped itself of all superstitions concerning the past.

Hazrat Mahal, Begum of Oudh, during the national liberation uprising of 1857-59 in India headed the rebels.

In my free time I do differential and integral calculus.

One of the most difficult tasks confronting philosophers is to descend from the world of thought to the actual world.