And they were both righteous before God, walking in all the commandments and ordinances of the Lord blameless.

To be used of God in a special way, to make a difference in our world, we must follow the life testimony of Zacharias and Elizabeth.

1. Righteous
2. Following commandments and ordinances
3. Blameless 

Conclusion 

1. Obedience
2. Sacrifice
3. Blessing