Copy this sentence to get a big reward.
Copy this sentence to achieve eternal life.
(True in a Delphic sense! Keep copying it and the sentence will have eternal life.)
Copy and obey this sentence to get big reward X and avoid punishment Y, and cooperate with others who are copying this sentence, and teach it to your children, and preach it to non-copiers, and punish those who stop copying it, or who copy different versions of it, and punish people who question this sentence, and also believe Z.
Where Z is the typically non-testable set of beliefs and practices distinguishing one religion from another, e.g. Christianity and Islam, which otherwise share the same X and Y (Heaven, Hell.)
Militant science in a nutshell:
Copy and believe this sentence with content X to get useful knowledge, and ridicule those not copying it, and teach it to your children and non-copiers, but if you find someone who is copying this sentence with a different X then test the two versions with procedure Y and adopt whichever X, or combination of X, best survives testing.