If you're married and you have a wife and you really love your wife is it good enough to only say to your wife 'I love her' the day you get married? Or should you tell her every single day when you wake up and every opportunity? And that's how I feel about my relationship with Jesus Christ is that it is the most important thing in my life.
While eschewing emotion - and its companion vulnerability - Obama should be careful not to sacrifice empathy the 'I feel your pain' connection that sustained Clinton. This connection is the shorthand people use to measure their leaders' intentions. If people believe you're on their side they will trust your decisions.