The laws of nature are but the mathematical thoughts of God.

- Euclid

Sire, there is no royal road to geometry.

- Euclid

A line is length without breadth.

- Euclid

Better balance, less pain and less restless leg syndrome.

- Euclid

Give him threepence, since he must make a gain out of what he learns.

- Euclid

Things which are equal to the same thing are also equal to one another.

- Euclid

That, if a straight line falling on two straight lines makes the interior angles on the same side less than two right angles, the two straight lines,…

- Euclid

And the whole is greater than the part.

- Euclid

A prime number is one (which is) measured by a unit alone.

- Euclid