I say to mankind, Be not curious about God. For I, who am curious about each, am not curious about God – I hear and behold God in every object, yet understand God not in the least.
As long as justice and injustice have not terminated their ever renewing fight for ascendancy in the affairs of mankind, human beings must be willing, when need is, to do battle for the one against the other.
A vision of truth which does not call upon us to get out of our armchair – why, this is the desideratum of mankind.
The common behavior of mankind is the system of reference by means of which we interpret an unknown language.
The greatest of all crimes are the wars that are carried on by governments, to plunder, enslave, and destroy mankind.
Just as Darwin discovered the law of development of organic nature, so Marx discovered the law of development of human history: the simple fact, hitherto concealed by an overgrowth of ideology, that mankind must first of all eat, drink, have shelter and clothing, before it can pursue politics, science, art, religion, etc.
I write to keep from going mad from the contradictions I find among mankind – and to work some of those contradictions out for myself.
Nature has placed mankind under the governance of two sovereign masters, pain and pleasure. It is for them alone to point out what we ought to do, as well as to determine what we shall do.
It is a startling and solemnizing fact that even as late as the twentieth century, the Great Command of Jesus Christ to carry the Gospel to all mankind is still so largely unfulfilled.
Mankind is poised midway between the gods and the beasts.