Quotes from Euclid

In right-angled triangles the square on the side subtending the right angle is equal to the squares on the sides containing the right angle.

There is no royal road to geometry.

[To Ptolemy I:] There is no royal road to geometry.

Q.E.D. [Quod erat demonstrandum: Which was to be proved.]

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

There is no Royal Road to Geometry.

What has been affirmed without proof can also be denied without proof.

Handwriting is a spiritual designing, even though it appears by means of a material instrument.

1. An 'unit' is that by virtue of which each of the things that exist is called one. 2. A 'number' is a multiple composed of units.

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