We regard it as a certainty that the earth, enclosed between poles, is bounded by a spherical surface.

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.

Every light has its shadow, and every shadow hath a succeeding morning.

Of all things visible, the highest is the heaven of the fixed stars.

For I am not so enamoured of my own opinions that I disregard what others may think of them.

The Universe, wrought for us by a supremely good and orderly Creator.

Nations are not ruined by one act of violence, but gradually and in an almost imperceptible manner by the depreciation of their circulating currency, through its excessive quantity.

Finally we shall place the Sun himself at the center of the Universe.

Those things which I am saying now may be obscure, yet they will be made clearer in their proper place.

The massive bulk of the earth does indeed shrink to insignificance in comparison with the size of the heavens.

Mathematics is written for mathematicians.

Sometimes you have to give something up to get something better.

In the sleeping state, instead, one is much more oneself, even if society never ceases to intervene.

I don't ever take anything for granted.

If any changes were to be made in society it had to be by the mothers.

I'm not an abstractionist... I'm not interested in relationships of colour or form or anything else.

I used to walk into a party and scan the room for attractive women. Now I look for women to hold my baby so I can eat potato salad sitting down.

In the roughest moments, remember: God is our Father; God does not abandon his children.

It looks like I had the most irrelevant education than anybody in the planet could have.

The Shariah has many other functions but also protects the tarqiah; it protects the spiritual path.

I'm insatiably curious about human nature.