The walls of Jerusalem were broken down and Nehemiah was called to rebuild them.

Nehemiah 4:6-18
So built we the wall; and all the wall was joined together unto the half thereof: for the people had a mind to work.
But it came to pass, that when Sanballat, and Tobiah, and the Arabians, and the Ammonites, and the Ashdodites, heard that the walls of Jerusalem were made up, and that the breaches began to be stopped, then they were very wroth, And conspired all of them together to come and to fight against Jerusalem, and to hinder it.
Nevertheless we made our prayer unto our God, and set a watch against them day and night, because of them. And Judah said, The strength of the bearers of burdens is decayed, and there is much rubbish; so that we are not able to build the wall.
And our adversaries said, They shall not know, neither see, till we come in the midst among them, and slay them, and cause the work to cease. And it came to pass, that when the Jews which dwelt by them came, they said unto us ten times, From all places whence ye shall return unto us they will be upon you.
Therefore set I in the lower places behind the wall, and on the higher places, I even set the people after their families with their swords, their spears, and their bows. And I looked, and rose up, and said unto the nobles, and to the rulers, and to the rest of the people, Be not ye afraid of them: remember the Lord, which is great and terrible, and fight for your brethren, your sons, and your daughters, your wives, and your houses.
And it came to pass, when our enemies heard that it was known unto us, and God had brought their counsel to nought, that we returned all of us to the wall, every one unto his work. And it came to pass from that time forth, that the half of my servants wrought in the work, and the other half of them held both the spears, the shields, and the bows, and the habergeons; and the rulers were behind all the house of Judah. They which builded on the wall, and they that bare burdens, with those that laded, every one with one of his hands wrought in the work, and with the other hand held a weapon.
For the builders, every one had his sword girded by his side, and so builded. And he that sounded the trumpet was by me.

We too are called to rebuild the walls of Jerusalem. They may be our own walls of salvation, with in the church or out reach into the community. We can’t be casual builders; we need to be armed builders. The enemy is all around us waiting for us to let down our guard giving them an entrance into the city. The armour of God is listed out in Ephesians 6:
13. Wherefore take unto you the whole armour of God, that ye may be able to withstand in the evil day, and having done all, to stand.
14. Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness;
15. And your feet shod with the preparation of the gospel of peace;
16. Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked.
17. And take the helmet of salvation, and the sword of the Spirit, which is the word of God:

Let us make sure that we are fully prepared to fight the battles of the day. While I was thinking about being armed builders, this song kept running through my head.

Army Of The Lord
Chorus –
Are we walking into the enemy’s camp, laying our weapons down shedding our armor as we go, leaving it on the ground? We’ve gotta be strong in the power of his might and prove to the enemy We are the army of the Lord and we’ve won the victory.

Verse 1 – All around us a war’s going on between the wrong and the right We’ve gotta choose which side we’re on-the darkness or the light Some of the soldiers of the Lord just don’t realize that the captain of the army of darkness has come to blind their eyes

Verse 2 – Can’t you see that we’re in a battle and there’s no place to hide? The shields of faith are full of darts and their shooting from every side Just shake out the darts and run right at em’ and remember who you’re fighting for Don’t fall asleep cuz’ if they catch ya’ they’ll take you prisoner of war

Let us be careful that we aren’t taken unawares while we are building.