The probability of something not happening does not decrease as we increase the number of times we worry about the possibility of it happening.

More than 99.99% of facts are not and will never be useful to even a single person.

It is a waste of time not to do the most effective, useful, or important thing you can do.

Being divorced does not necessarily make one’s advice on marriage useless … or useful.

We are not as important to most people as we are to ourselves. As a matter of fact, we are—to most people—not important at all.

As useful as an unhappy artist. As useless as a happy philosopher.

Useful information badly written is way more valuable than useless information well written.

There is not necessarily a correlation between how much time or effort a thing demands and how important or useful it is.