1 Samuel 17:
48 As the Philistine moved closer to attack him, David ran quickly toward the battle line to meet him. 49 Reaching into his bag and taking out a stone, he slung it and struck the Philistine on the forehead. The stone sank into his forehead, and he fell facedown on the ground.
As a child, this bible story had a strong effect on me. I understood that intelligence can defeat brute strength, when one plans ahead and stays the course. I was never a big guy, yet I never backed down from bullies, once I reached about twelve years of age. 90% of the time, I talked down the attacks of bullies, including armed robbers, and walked away, unscathed. Of course, I also learned that having a weapon, you can skillfully use, is quite valuable.