The reason I'm not a neurobiologist but a cognitive psychologist is that I think looking at brain tissue is often the wrong level of analysis. You have to look at a higher level of organization.

I think there's a much greater level of caution -- you could also say it's a much higher level of responsibility.

The irritation level is just a lot higher.

I think that Samantha has been taking it to a higher level all year long. Mentally, she's at a higher level and has developed on the golf course maturity wise to where she knows she doesn't have to be at her best all the time to compete and win. But she certainly goes into each event knowing that she has what it takes and never questions herself.

We will have the same basic military situation at a higher and higher level of armament which I don't think does a lot of good for anybody and certainly doesn't foster the sort of peaceful resolution of the issues there which we want to maintain,

You have to perform at a consistently higher level than others. That's the mark of a true professional.