A linguist would be shocked to learn that if a set is not closed this does not mean that it is open, or again that "E is dense in E" does not mean the same thing as "E is dense in itself".

Try a hard problem. You may not solve it, but you will prove something else.

A Miscellany is a collection without a natual ordering relation.

The first test of potential in mathematics is whether you can get anything out of geometry.

I recall once saying that when I had given the same lecture several times I couldn't help feeling that they really ought to know it by now.

I listen only to Bach, Beethoven or Mozart. Life is too short to waste on other composers.

A heavy warning used to be given that pictures are not rigorous; this has never had its bluff called and has permanently frightened its victims into playing for safety.