[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.
The human mind has never invented a labor-saving machine equal to algebra.
— Anonymous
From The Quote Garden
Go down deep enough into anything and you will find mathematics.
— Dean Schlicter
[Does anyone know who he is? Plenty of people quote him, but I can’t find a single link about the man himself.]
The man ignorant of mathematics will be increasingly limited in his grasp of the main forces of civilization.
To all of us who hold the Christian belief that God is truth, anything that is true is a fact about God, and mathematics is a branch of theology.
Denise Gaskins' Let's Play Math 
Just dropping by.Btw, you website have great content!
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I really like the Einstein quote. Thanks for sharing them.