Cunning or innocent...Which is best ?

Being innocent on the outside and being cunning on the inside. When people think you're so innocent and you're actually really clever on the inside, you know that you've got people fooled. It just goes to show how easily fooled some people can be because some people are really quick to assume things about a person. You should never under-estimate anyone, just because you think someone's weak and naive, it doesn't mean that they really are. They could easily trick you and have you exactly where they want you without you even knowing it.