It is better not only to build a defense but also to establish a fighting style. In every battle, you need to wear an armor and a sword, if not, there's only a little chance of surviving. Knowing that, in order to build the best defense and fighting style, you must learn first. No warrior was born with a sword in hand, someone gives it. Learn from your mistakes and that will be your foundation. Keep the wisdom that the elders have thought you. Remember everything you've learned when facing a challenge and you'll be able to overcome it. If not, you might lose, but take that as another lesson from life.