Be you not unequally yoked together with unbelievers: for what fellowship has righteousness with unrighteousness? and what partnership has light with darkness?
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Augustine of Hippo
AD 430
Now, I speak to the true Christians. If you believe, hope and love otherwise [than the pagans do], then live otherwise and gain approval for your distinctive faith, hope and charity by distinctive actions. Pay attention to the apostle when, in earnest admonition, he says: “Do not bear the yoke with unbelievers. For what has justice in common with iniquity? Or what fellowship has light with darkness? … Or what part has the believer with the unbeliever? And what agreement has the temple of God with idols?” New Year’s Day