Every individual... neither intends to promote the public interest, nor knows how much he is promoting it... he is in this, as in many other cases, led by an invisible hand to promote an end which was no part of his intention.

No society can surely be flourishing and happy, of which the far greater part of the members are poor and miserable.

The real tragedy of the poor is the poverty of their aspirations.

It is not from the benevolence of the butcher, the brewer, or the baker that we expect our dinner, but from their regard to their own interest.

Science is the great antidote to the poison of enthusiasm and superstition.

Nothing is more powerful than an idea whose time has come.

-- Victor Hugo

I shall run wild for six months to a year, but I have utterly no confidence for the second and third years.

-- Isoroku Yamamoto

Do not give things to children; give them hardship.

-- Nogi Maresuke

Let those who will, write the nation's laws, if I can write its textbooks.

-- Paul Samuelson

I don't care who writes a nation's laws, or crafts its advanced treaties, if I can write its economics textbooks.

-- Paul Samuelson

The most valuable of all capital is that invested in human beings.

-- Alfred Marshall