To much Defense can blind you to your opportunities

I learned that lesson again today when I was playing Starcraft. There were many opportunities for my superior comrades to attack our enemies, but they did not take them. They were much better at creating a complex economy then I was, but they lacked the pizzazz to know when it was time to "strike while the metal is hot." We finally won, but only after I embarassed them into attacking by questioning their cahones.