Remember what God has done for us and my blood comes from.

Nehemiah 12:1-26
Lists first the priests and Levites who returned with Zerubbabel, then descendants of high priest Joshua, then heads of families of priests, and records of the families of priests and Levites, ending with Temple duties.
It is not bureaucratic pedantry(學究氣) that has preserved these names. The point is that these people and their chronicler are conscious of their roots and of their structure as God's accompany. This is no rabble of refugees, settling down anywhere.
Why?
Write down the lists of the priests and Levites to know their roots of God's accompany, let their descendant remember where they came from and what their structure.
Remember our ancestor and obey their heritages and culture and the Lord is our God.
Whoever forget his ancestor forget his root and without culture and like the dust in the wind.
How?
Remember what God has done for us and my blood comes from.