FORT JACKSON, S.C. -- July 2012 marked the 75th anniversary of the first step taken by a guard at the Tomb of the Unknown Soldier. It is a sight to see the precision and gallantry of the guard as he takes 21 steps, pauses for 21 seconds, and returns for 21 more steps to honor these fallen warriors. The guards do this over and over again without flaw. When I think of them, one word comes to mind, "duty." These guards embody what the word, "duty," means.As I ponder this word, I think, "What if we all lived up to this value as a person of faith and conviction?" According to scripture, we all have a Christian duty toward others.First, we have a Christian duty to serve each other. The Bible says, "Each one should use whatever gift he has received to serve others, faithfully administering God's grace in its various forms." (1 Peter 4:10 ) It is in our service that all will see God's grace in action as we demonstrate our faith. Service is the embodiment of Christian love toward others.Second, we have a Christian duty to encourage one another. First Thessalonians 5:11 says, "Therefore, encourage one another and build each other up." It is easy in this world to become discouraged because of work, relationships and finances. It is through encouragement that people can rise up and overcome any obstacle they may encounter if they believe in themselves. So, it is our Christian duty to help them believe, overcome and stay faithful in a discouraging world.Third, we have a Christian duty to help carry burdens for others. Galatians 6:2 says, "Carry each other's burdens, and in this way you will fulfill the law of Christ." Nobody should have to walk alone in the valley of being burdened. We need to walk with others and share in and lighten the heavy load many carry on their shoulders. Jesus removed our greatest burden at the cross. Therefore, we -- just as Jesus did -- need to help our brothers and sisters who are lost in the valley.Lastly, we have a Christian duty to pray for each other. James 5:16 says, "Therefore confess your sins to each other and pray for each other so that you may be healed. The prayer of a righteous man is powerful and effective." The heavy loads we carry just don't stay in the natural world, but also belong in the spiritual. We must pray for each other. Sometimes when we are tired and burdened we just don't feel like praying. Therefore, we as Christians must intercede for our brothers and sisters and pray on their behalf. Powerful and effective prayer will make all the difference.To whom much is given, much is required. As Christians, we have a duty toward others. It is not a choice, but it is required. What a much different place this would be if we all as Christians would rise up and perform our duty as diligently as the guard at the Tomb of the Unknown. Therefore, be encouraged that it is not too late to take your post and serve God and others to the fullness of your duty. For if you do not take your post and do your duty, who will?