Quotations XXIII: The Poetry of Logical Ideas

distinctively-red-by-pshutterbug
[Photo by pshutterbug.]

It’s been ages since I posted any blackboard quotes, so here are a few gems from last semester. [Hat tip: I found most of the quotes in this list at The Quote Garden’s Quotations about Math page.]

Pure mathematics is, in its way, the poetry of logical ideas.

— Albert Einstein

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Quotations XXII: Six Months in the Dark


[Photo by frozenchipmunk.]

School is in session, which means I am once again searching out pithy, inspirational quotations for my chalkboard. Some recent tidbits…

The more I work and practice, the luckier I seem to get.

— Gary Player
Quoted in Precalculus Mathematics in a Nutshell

Continue reading Quotations XXII: Six Months in the Dark

Quotes XXI: How Is Logic Like Whiskey?


Photo by Brian – Progressive Spin.

Logic is the science of making valid deductions and proofs — and it is also a fruitful topic for blackboard quotes. Here are a few of my favorites:

You can only find truth with logic if you have already found truth without it.

— G. K. Chesterton
The Man Who Was Orthodox

Continue reading Quotes XXI: How Is Logic Like Whiskey?

Quotations XX: How Old Was Erdös?

Math blackboard
Photo by foundphotoslj.

Here are a few mathematical gems from my co-op class blackboard:

I must study politics and war that my sons may have liberty to study mathematics and philosophy.

— John Adams

When I was a child, the Earth was said to be two billion years old. Now scientists say it’s four and a half billion. So that makes me two and a half billion.

— Paul Erdös

Continue reading Quotations XX: How Old Was Erdös?

Quotations XIX: How Do We Learn Math?

He doesn’t learn algebra
in the algebra course;
he learns it in calculus.

I have been catching up on my Bloglines reading [procrastinating blogger at work — I should be going over the MathCounts lesson for Friday’s homeschool co-op class], and found the following quotation at Mathematics under the Microscope [old blog posts are no longer archived].

Continue reading Quotations XIX: How Do We Learn Math?

Quotations XVII: If People Don’t Believe That Mathematics Is Simple…

Quotes from my blackboard during October:

Experience is the hardest kind of teacher. It gives you the test first, and the lesson afterward.

— Vernon Law

What, after all, is mathematics but the poetry of the mind, and what is poetry but the mathematics of the heart?

— David Eugene Smith

Continue reading Quotations XVII: If People Don’t Believe That Mathematics Is Simple…

Quotations XVI: Back to the Blackboard

Classes are back in session at our homeschool co-op, so I am again collecting short quotes for the blackboard. Here are the ones I used in September:

Any fool can know. The point is to understand.

— Albert Einstein

Life without geometry is pointless.

— Anonymous

You don’t understand anything until you learn it more than one way.

— Marvin Minsky

Quotations XV: More Joy of Mathematics

Mathematics is a vast adventure; its history reflects some of the noblest thoughts of countless generations.

— Dirk J. Struik
A Concise History of Mathematics

Mathematics is a world created by the mind of men, and mathematicians are people who devote their lives to what seems to me a wonderful kind of play!

— Constance Reid

Continue reading Quotations XV: More Joy of Mathematics