"O amor vence tudo."
This translates literally as "Love wins everything."
Here are some other options, with slight variations in meaning:
* "O amor é mais forte que tudo." ("Love is stronger than everything.")
* "O amor supera tudo." ("Love overcomes everything.")
* "O amor é a força mais poderosa." ("Love is the most powerful force.")
* "O amor conquista tudo." ("Love conquers everything.")
The best translation depends on the specific context and the desired nuance.