“One by one, people will say, ‘I am the Lord’s’. They will come to join the people of Israel. They each will mark the name of the Lord on their arms and call themselves members of God’s people”. 

Isa 44:5 GNB 

Some people proclaim their faith by putting bumper stickers on their cars. “I love Jesus” is one. Another is, “Protected by Psalm 91”. One church community gave their members small crosses to nail onto their gates with the words “He is risen” on them. Spreading their faith in this kind of way means that those doing so have nailed their colours to the mast and that God means something big in their lives. 
The prophet Isaiah, speaking to the Israelite exiles in Babylon, was looking forward in hope and confidence. He was trying to rally the dispirited people and to kindle a positive attitude by reminding them of the promise God had made many centuries earlier to their forefather Abraham. Then the Lord had said, “I will give you many descendants, and they will become a great nation. I will bless you and make your name famous, so that you will be a blessing…And through you I will bless all nations” (Gen 11:2,3 GNB). 
The promise of old is also a call to the present people of God and disciples of Jesus Christ. They cannot just bask in the warmth of enjoying God’s love. Their calling is to promote that faith wherever they can and to encourage others to join them. And it is not solely a task for the professionals. Every believing Christian is called by Christ to share his or her faith with others in some small way, a word of encouragement here, an act of kindness there. 

Lift Jesus higher. Lift him up for the world to see.