If you read Nahum 2:1-2, you will find how Ninevah was headed for destruction and the prophet declared some precise instructions. First he said, Man the fort! In other words, populate your position. Understand your place and get in it and stay there for now.
Nahum placed emphasis on remaining where you have been called and fulfilling the responsibilities of that position. Often, we look for greener pastures and desires something better. When perhaps, God has you exactly where he wants you and simply calls upon you to be faithful where He has placed you.
Godliness with contentment is great gain. Man the Fort! You and I are in a battle and our enemy is out to take us down, to kill, to steal, and to destroy. We must stay in position and be prepared.