1 Timothy 3: Christian leader qualifications

The church in Ephesus had false masters, bad leaders. Paul addresses the qualifications of the leaders that should take place the bad leaders. The message/teachings of the bishops/masters were crucial. The focus of the message:

16 This Christian life is a great mystery, far exceeding our understanding, but some things are clear enough:
He appeared in a human body,
    was proved right by the invisible Spirit,
        was seen by angels.
He was proclaimed among all kinds of peoples,
    believed in all over the world,
        taken up into heavenly glory.