David Petersen said this quote

You should always aim to be your own mouse, Lieam. In fact...you already are. You are not so quick to jump into danger as Saxon and not as pensive of mind as Kenzie. They rely on each other too much. Saxon knows he can afford to be reckless since Kenzie acts as his conscience. And Kenzie can linger in his thoughts and plans, because he knows Saxon can defend him. I tested Kenzie earlier. I wanted to see if he would be swayed by my advice. It took Saxon's coaxing to make up the greyfur's mind. Be compleete with in yourself young redfur...you will never disappoint. Even in solitude.