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LYNCHBURG, Va.-- Donald Trump has delivered a message that's rarely preached to students at a Christian school.

The billionaire developer Donald Trump told 10,000 students at Liberty University Monday that if someone takes advantage of them, they should "get even" rather than turn the other cheek as Jesus said.

The thrice-married Trump also said he advises everyone to get a pre-nuptial agreement, but added: "I won't say it here because you people don't get divorced, right?"

Trump described himself as "a proud Christian" who loved going to Sunday school as a boy and learning about God.

In a wide ranging speech, Trump criticized President Barack Obama's foreign policy, but said Obama is "a Teflon president" who seems to get good press no matter what he does.