A few "square" sayings:
You can’t fit a round peg in a square hole.
A round man cannot be expected to fit in a square hole right away. He must have time to modify his shape.
Square meals often make round people.
-E. Joseph Cossman
It is easier to square the circle than to get round a mathematician.
-Augustus de Morgan
The intelligence of the creature known as a crowd, is the square root of the number of people in it.
The Internet is becoming the town square for the global village of tomorrow.