 Why does Delilah try so hard in the Philistines? What's the secret of his strength? What's the secret of his strength? What's the secret of Samson's strength? Well, if he was the size of the big shell, like seven foot two and 450 or 500 pounds, there's no mystery. He's a giant. No wonder he can pick you up and throw you across the room or lift this tree up by the roots and smash people over the head with, because he's a giant.