The numbers of distinct human societies or nations, when our race is twice its present age, may be far greater than the total number of all the men who have ever lived up to the present time.

Perhaps no other year before or since 1984 has been awaited with such eager anticipation.

I am an optimist. Anyone interested in the future has to be otherwise he would simply shoot himself.

Science is the only religion of mankind.

Moses Kaldor had always loved mountains; they made him feel nearer to the God whose nonexistence he still sometimes resented.

I can never look now at the Milky Way without wondering from which of those banked clouds of stars the emissaries are coming. If you will pardon so commonplace a simile, we have set off the fire alarm and have nothing to do but to wait. I do not think we will have to wait for long.

Whether we are based on carbon or on silicon makes no fundamental difference we should each be treated with appropriate respect.