No Sword in the Hand

There are two types of innovation: Sustaining Innovation (better & sharper sword) and Disruptive Innovation (Slingshot). Goliath was in fact good at sustaining innovation: he sharpened his sword every day, and he worked out every day like Conan the barbarian. Incumbent companies actually do this type of incremental innovation well, but they often miss out on the disruptive one, the one that will change the rules of the game forever.