When you're 20 you care what everyone thinks, when you're 40 you stop caring what everyone thinks, when you're 60 you realize no one was ever thinking about you in the first place. You have enemies? Good. That means you've stood up for something, sometime in your life.
The tank was originally invented to clear a way for the infantry in the teeth of machine-gun fire. Now it is the infantry who will have to clear a way for the tanks.
Broadly speaking, human beings may be divided into three classes: those who are billed to death, those who are worried to death, and those who are bored to death.