The tenth gate of the City of God is named after Gad, whose name means "troop." This gate reminds us that we are part of a God-ordained army to carry the gospel to the whole earth.
After Jesus' resurrection and just before His ascension into heaven, He gave His followers a mission that changes everything about how we live our lives and what priorities we pursue. Jesus' mission for us is to go and tell everyone about the good news of salvation.
