[He glances up from his sitting position, too tired at this point to yell really.] It's ki, an energy inside every living being. That's not even a good representation of what it can do. What you saw now was only a billionth of the power I have.

[He's got an arrogant tone to his voice, but overall it's really said matter-of-fact. Vegeta is currently just relieved that his house isn't going to burn down.]