Charles Hermite

There exists, if I am not mistaken, an entire world which is the totality of mathematical truths, to which we have access only with our mind, just as a world of physical reality exists, the one like the other independent of ourselves, both of divine creation.

What Dred Scott's master might lawfully do with Dred Scott, in the free state of Illinois, every other master may lawfully do with any other one, or 1,000 slaves, in Illinois, or in any other free state.

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.