Communication can only take place among equals.

Anyone who believes exponential growth can go on forever in a finite world is either a madman or an economist.

A world of unseen dictatorship is conceivable, still using the forms of democratic government.

Economics has been incurably growth-oriented and addicted to everybody growing richer, even at the cost of exhaustion of resources and pollution of the environment.

Equilibrium is a figment of the human imagination.

Theories without facts may be barren, but facts without theories are meaningless.

We should always bear in mind that numbers represent a simplification of reality.

DNA has been aptly described as the first three-dimensional Xerox machine.

The world moves into the future as a result of decisions, not as a result of plans. Plans are significant only insofar as they affect decisions.

If we saw tomorrow's newspaper today, tomorrow would never happen.

There is no such thing as economics, only social science applied to economic problems.

We appreciate most that which we have lived without.

The world is full of countries that have only come into existence in the last couple of hundred years, or even in the last few decades, while changes to borders are happening every day.

Many people think that crying is a sign of weakness, they're wrong - it is a sign of healing.

When the beauty and warmth of summer is here, then dancing leaves with colors are not too far.

Only monsters could slay monsters.

I teach at Harvard that the world and the heavens, and the stars are all real, but not so damned real, you see.

The Republican Party would have the American flag and the swastika flying side by side.

The future is coming so fast, we can't possibly predict it; we can only learn to respond quickly.

Pity does not get you aid. Admiration at your refusal to give in does.

You don't overturn a previous court's decisions lightly and I think most Americans are somewhere in the middle on abortion and there's not going to be a revolution here at all.