God is pretty serious about this coward stuff such that in Revelation 21: 8 he clearly shows no cowards will be in heaven.
You see God’s generals past were always challenged by him - they were called to epic battles, show downs, sacrifices and denial of self. They were willing to die for their faith – even in the face of persecution.
Jesus, Paul, Abraham, Hosea (married a prostitute), Isaiah (walked naked for 3 years) and so on.
In today's generation, a man like brother Clifford Edwards was saved from 20 years of being a homeless man sleeping under London's embarkment station - this man echoed what God's people have known:
Christianity is not for cowards!