The denial of the 'NOW' is the origin of our speech.
Mathematicians have tried in vain to this day to discover some order in the sequence of prime numbers, and we have reason to believe that it is a mystery into which the human mind will never penetrate.
All the modern higher mathematics is based on a calculus of operations, on laws of thought. All mathematics, from the first, was so in reality, but the evolvers of the modern higher calculus have known that it is so.
Therefore elementary teachers who, at the present day, persist in thinking about algebra and arithmetic as dealing with laws of number, and about geometry as dealing with laws of surface and solid content, are doing the best that in them lies to put their pupils on the wrong track for reaching in the future any true understanding of the higher algebras.
Algebras deal not with laws of number, but with such laws of the human thinking machinery as have been discovered in the course of investigations on numbers.
Mary Everest Boole.
Mathematics is the queen of the sciences and arithmetic is the queen of mathematics. She often condescends to render service to astronomy and other natural sciences, but in all relations, she is entitled to first rank.
Carl Friedrich Gauss.
2, 3 and the neighbor numbers of 6n without their products are prime.