Mary Barra quotes and aphorisms about work Mary Barra Mary Barra Mary Barra ,, It's a marathon, not a sprint. I actually feel like I come to work stronger when I've had a little ... Mary Barra ,, When you look at the truck market in North America, you have to understand the customer, and that's... Mary Barra ,, I'm a big believer of work/life balance. You need a little down time to recharge to make sure that ...