Abraham Lincoln : It was right after the revolution, right after peace had been concluded. And Ethan Allen went to London to help our new country conduct its business with the king. The English sneered at how rough we are and rude and simple-minded and on like that, everywhere he went. 'Til one day he was invited to the townhouse of a great English lord. Dinner was served, beverages imbibed, time passed as happens and Mr. Allen found he needed the privy. He was grateful to be directed to this. Relieved, you might say. Mr. Allen discovered on entering the water closet that the only decoration therein was a portrait of George Washington. Ethan Allen done what he came to do and returned to the drawing room. His host and the others were disappointed when he didn't mention Washington's portrait. And finally his lordship couldn't resist and asked Mr. Allen had he noticed it, the picture of Washington. He said he had. Well, what did he think of its placement? Did it seem appropriately located to Mr. Allen? And Mr. Allen said it did. The host was astounded.
Abraham Lincoln : "Appropriate? George Washington's likeness in a water closet?"
Abraham Lincoln : "Yes," said Mr. Allen, "where it will do good service. The world knows nothing will make an Englishman shit quicker than the sight of George Washington."
Abraham Lincoln : I love that story.
Euclid's first common notion is this: Things which are equal to the same things are equal to each other. That's a rule of mathematical reasoning and its true because it works - has done and always will do. In his book Euclid says this is self evident. You see there it is even in that 2000 year old book of mechanical law it is the self evident truth that things which are equal to the same things are equal to each other.