Eratosthenes was the director of the great library of Alexandria, the Centre of science and learning in the ancient world. Aristotle had argued that humanity was divided into Greeks and everybody else, whom he called barbarians and that the Greeks should keep themselves racially pure. He thought it was fitting for the Greeks to enslave other peoples. But Erathosthenes criticized Aristotle for his blind chauvinism, he believed there was good and bad in every nation.
If a man, before he passed from one stage to another, could know his future life in full detail, he would have nothing to live for. It is the same with the life of humanity. If it had a programme of the life which awaited it before entering a new stage, it would be the surest sign that it was not living, nor advancing, but simply rotating in the same place.
I think I'm just a traveler. When you walk across a river and there's no bridge, you build one. I'm used to having to deal with Chinese Communist ideology - it's not really an ideology, but a method of control. But China's problems are not just China's problems - they're human problems. Humanity has always worked better when you see it as one.
What is the use of living, if it be not to strive for noble causes and to make this muddled world a better place for those who will live in it after we are gone? How else can we put ourselves in harmonious relation with the great verities and consolations of the infinite and the eternal? And I avow my faith that we are marching towards better days. Humanity will not be cast down. We are going on swinging bravely forward along the grand high road and already behind the distant mountains is the promise of the sun.
What can become of him if he is in such bondage to the habit of satisfying the innumerable desires he has created for himself? He is isolated, and what concern has he with the rest of humanity? They have succeeded in accumulating a greater mass of objects, but the joy in the world has grown less.