It gives you access to the absolute pick of insights into human nature from the greatest experts in their field.

My calculus teacher was really not the greatest expert, and he would be the first to admit it.

I'm the world's greatest expert on some of these playwrights.

"This really is very peculiar, and I know you're the world's greatest expert."

"These people are the greatest experts in the world," he said.

But not to the world's greatest expert in combat suit tactics.

Known for his charm and one of Europe's greatest experts on luxury, he died in 2010 after a long illness.

In those days, he was one of the greatest experts for differential equations.

Just today I managed to meet the greatest expert on the subject.

And who doesn't like to be the world's greatest expert on some tiny area?