Euclid quotes

The laws of nature are but the mathematical thoughts of God.
 Euclid 
And the whole is greater than the part.
 Euclid 
In rightangled triangles the square on the side subtending the right angle is equal to the squares on the sides containing the right angle.
 Euclid 
QED  Quod erat demonstrandum.
 Euclid 

A line is length without breadth.
 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, if produced indefinitely, meet on that side on which the angles are less than two right angles.
 Euclid 
Things which are equal to the same thing are also equal to one another.
 Euclid 
Sire, there is no royal road to geometry.
 Euclid 

A prime number is one (which is) measured by a unit alone.
 Euclid 
Give him threepence, since he must make a gain out of what he learns.
 Euclid 
Better balance, less pain and less restless leg syndrome.
 Euclid
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