“Like all his type, Newton was wholly aloof from women.”

It has been pointed out already that no knowledge of probabilities, less in degree than certainty, helps us to know what conclusions are true, and that there is no direct relation between the truth of a proposition and its probability. Probability begins and ends with probability.

The duty of “saving” became nine-tenths of virtue and the growth of the cake the object of true religion.

It economics is a method rather than a doctrine, an apparatus of the mind, a technique of thinking which helps its possessor to draw correct conclusions.

In truth, the gold standard is already a barbarous relic.

The difficulty lies, not in the new ideas, but in escaping the old ones, which ramify, for those brought up as most of us have been, into every corner of our minds.

It is the duty of the long-term investor to endure great losses with equanimity.

Markets can remain irrational longer than you can remain solvent.

Gold is a relic from a time when government’s were less trustworthy in these matters (currency debasement) than they are now.

I do not know which makes a man more conservative – to know nothing but the present, or nothing but the past.

Economics is a very dangerous science.

I was suffering from my chronic delusion that one good share is safer than ten bad ones, and I am always forgetting that hardly anyone else shares this particular delusion.

The forces of the nineteenth century have run their course and are exhausted.

What an extraordinary episode in the economic progress of man that age was which came to an end in August, 1914!

Nothing mattered except states of mind, chiefly our own.

I believe myself to be writing a book on economic theory which will largely revolutionize – not, I suppose, at once but in the course of the next ten years – the way the world thinks about economic problems.

The boom, not the slump, is the right time for austerity at the Treasury.