Leonhard Euler

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

— Leonhard Euler

Now I will have less distraction.

— Leonhard Euler

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.

— Leonhard Euler

To those who ask what the infinitely small quantity in mathematics is, we answer that it is actually zero. Hence there are not so many mysteries hidden in this concept as they are usually believed to be.

— Leonhard Euler

A function of a variable quantity is an analytic expression composed in any way whatsoever of the variable quantity and numbers or constant quantities.

— Leonhard Euler