Blow the trumpet in the new moon, in the time appointed, on our solemn feast day.
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Augustine of Hippo
6. "Sound the trumpet" (ver. 3). This is, Loudly and boldly preach, be not affrighted! as the Prophet says in a certain place, "Cry out, and lift up as with a trumpet thy voice." Sound the trumpet in the beginning of the month of the trumpet." It was ordered, that in the beginning of the month there should be a sounding of the trumpet: and this even now the Jews do in bodily sort, after the spirit they understand it not. For the beginning of the month, is the new moon: the new moon, is the new life. What is the new moon? "If any, then, is in Christ, he is a new creature." What is, "sound the trumpet in the beginning of the month of the trumpet "? With all confidence preach ye the new life, fear not the noise of the old life.