Engels' Eulogy of Marx:

"On the 14th of March, at a quarter to three in the afternoon, the greatest living thinker ceased to think. He had been left alone for scarcely two minutes, and when we came back we found him in his armchair, peacefully gone to sleep - but forever.

An immeasurable loss has been sustained both by the militant proletariat of Europe and America and by historical science, in the death of this man. The gap that has been left by the departure of this mighty spirit will soon enough make itself felt.

Just as Darwin discovered the law of development of organic nature, so Marx discovered the law of development of human history. Marx also discovered the special law of motion governing the capitalist mode of production, and the society this mode of production has created.

Two such discoveries would be enough for one lifetime. Happy the man to whom it is granted to make even one such discovery. But in every single field which Marx investigated, even in that of mathematics, he made independent discoveries.

But this was not even half the man. Science was for Marx a historically dynamic, revolutionary force. However great the joy with which he welcomed a new discovery in some theoretical science whose practical application perhaps it was as yet quite impossible to envisage.

For Marx was before all else a revolutionist. His real mission in life was to contribute to the overthrow of capitalist society and of the state institutions which it had brought into being, to contribute to the liberation of the modern proletariat.

Consequently, Marx was the best hated and most calumniated man of his time. Governments, both absolutist and republican, deported him from their territories. Bourgeois, whether conservative or ultra-democratic, vied with one another in heaping slanders upon him.

All this he brushed aside as though it were a cobweb, ignoring it, answering only when extreme necessity compelled him. And he died beloved, revered, and mourned by millions of revolutionary fellow workers.

His name will endure through the ages, and so also will his work."