[D]on't be so smart that you act stupid.

We live in an era of smart phones and stupid people.... Go figure.

The different between the smart and the stupid is that the smart make mistakes, but the stupid makes it a habit.

I'm so smart now. Everyone's always like 'take your top off'. Sorry, NO! They always want to get that money shot. I'm not stupid.

He could be so charming and irreverent and witty, and then-bam!-a switch flipped and he reverted right back to the cocky asshole everyone reported him to be.

It's important to be smart, but it's also important to be active with your intelligence. The more you sit around over-thinking things, the more trouble you get into.