Take the Oath along with this 90-year-old WWII vet (time index 6:50). Don't do it unless you mean it.
"I, [insert name] do solemnly [swear or affirm] to support and defend the Constitution of the United States against all enemies, foreign and domestic, and I will bear true faith and allegiance to the same. I take this Oath freely, without mental reservation or purpose of evasion, pledging my life, my fortune, and my sacred honor, so help me God."
More from my other hero, Mike Vanderboegh from Sipsey Street Irregulars.