“A set is a Many that allows itself to be thought of as a One.”

Don’t always blindly follow guidance and step-by-step instructions; you might run into something interesting.

Every transfinite consistent multiplicity, that is, every transfinite set, must have a definite aleph as its cardinal number.

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My beautiful proof lies all in ruins.

There is no doubt that we cannot do without variable quantities in the sense of the potential infinite. But from this very fact the necessity of the actual infinite can be demonstrated.

This view of the infinite, which I consider to be the sole correct one, is held by only a few. While possibly I am the very first in history to take this position so explicitly, with all of its logical consequences, I know for sure that I shall not be the last!

Had Mittag-Leffler had his way, I should have to wait until the year 1984, which to me seemed too great a demand!

Mathematics, in the development of its ideas, has only to take account of the immanent reality of its concepts and has absolutely no obligation to examine their transient reality.

The potential infinite means nothing other than an undetermined, variable quantity, always remaining finite, which has to assume values that either become smaller than any finite limit no matter how small, or greater than any finite limit no matter how great.

The essence of mathematics lies precisely in its freedom.

A false conclusion once arrived at and widely accepted is not easily dislodged and the less it is understood the more tenaciously it is held.

The fear of infinity is a form of myopia that destroys the possibility of seeing the actual infinite, even though it in its highest form has created and sustains us, and in its secondary transfinite forms occurs all around us and even inhabits our minds.

In mathematics the art of proposing a question must be held of higher value than solving it.

To ask the right question is harder than to answer it.

I realize that in this undertaking I place myself in a certain opposition to views widely held concerning the mathematical infinite and to opinions frequently defended on the nature of numbers.

Great innovation only happens when people aren’t afraid to do things differently.

One day it’s all going to be clear. It’s all going to make sense. You’re going to be able to say, “So that’s why God allowed that in my life!” Until then, God wants you to trust him.

I’m not allowed to get a big head, I’ve still got to do the simple things in life.

Just for today, let yourself be human.

I am giving myself permission to not have it all figured out by the end of 2020.

The more we allow ourselves to enjoy, the more reasons we find to be joyful.

So much about living life, to me, is about humility and gratitude. And I’ve tried very hard to have those qualities and be that person and I’m just so disappointed in myself that I allowed it to slip.

Certainly the Constitution does not require discrimination on the basis of sex. The only issue is whether it prohibits it. It doesn’t.

If you are always allowed to stop training whenever you feel discomfort, you will find it too easy to give yourself permission to quit.