When And How Should Christians Publicly Fight For Their Faith?

How should the church’s voice and presence in 21st century culture mirror how God’s messages to the world were revealed by the prophetic voices in the Bible?

I have been wrestling with this for a while. The Bible clearly calls Christians to be “salt” that adds spiritual savor, to be “light,” that casts the light of truth and hope into a sin-darkened world (Matthew 5:13-16).  How do we do this well? What does the proverbial “word fitly spoken” look like? What is within our power to do to make sure we do not lose the savoriness of our salty message? How do we use our freedoms in a democratic system to best represent Christ and spread the life of the Kingdom of God?