Leonhard Euler

“For the sake of brevity, we will always represent this number 2.718281828459... by the letter e.”

“Nothing takes place in the world whose meaning is not that of some maximum or minimum.”

“Logic is the foundation of the certainty of all the knowledge we acquire.”

“Now I will have less distraction.”

“To those who ask what the infinitely small quantity in mathematics is, we answer that it is actually zero.”

“Madam, I have come from a country where people are hanged if they talk.”

“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.”