One can be honest and a spy.

Signorina, I have two arms, but only one heart.

If you will be gracious and consider! Say, here are two hands.

One hand does this thing, one hand does that thing, and that thing wipes out this thing.
It amounts to clear reasoning! Here are two eyes.

Were they meant to see nothing but one side! Here is a tongue with a line down the middle almost to the tip of it--which is for service.