I Chronicles 26-27
"All these were the sons of Obed-edom; they and their sons and their relatives were able men with strength for the service" (26:8). Other gate-keepers were called "mighty men of valor" (v6). They were well-suited to the specific task of guarding the gates of the Temple complex. The musicians were "skillful," and the most skilled were teachers of others (25:7-8). By choosing many tasks "by lot," the Israelites recognized God's active role in ordering their community.
In God's plan, every community member was essential, just as every member of the Body has a gift to offer (I Cor 12).