There's a domino effect with certain things you say.

There's a drive in me that won't allow me to do certain things that are easy.

Certain things you have to stumble on to. They can't be preprogrammed.

There are certain things you don't discuss with Ansel, especially if you don't agree.

I'm not Mr. Mom, but there's just certain things I won't say anymore.

Certain things give you another perspective in life.