vain i.e. useless, in vain, as we say. Literally, empty. Vulg. inanis. "You have a vaine faith if you believe in a dead man. He might be true man, though He remained in death. But it concerns you to believe that He was the Son of God too. And He was -declared to be the Son of God with power by the resurrection from the dead." Romans 1:4." Dr Donne, Sermon on Easter Day.

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