“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.” Simmons, G., Calculus Gems (1992) Leonhard Euler
“God, when he created the world, arranged the course of all events so that every man should be every instant placed in circumstances to him most salutary. Happy the man who has wisdom to turn them to good account!” Letters to a Princess of Germany, 3 vols., (1768–1772) Leonhard Euler
“Now I will have less distraction. (upon losing vision)” Eves, H., In Mathematical Circles (1969) Leonhard Euler
