“be a good minister of Jesus Christ” : 1 Timothy 4

For everything created by God is good, and nothing is to be rejected if it is received with thanksgiving; for then it is consecrated by the word of God and prayer. If you put these instructions before the brethren, you will be a good minister of Christ Jesus, nourished on the words of the faith and of the good doctrine which you have followed.
1 Timothy 4:4‭-‬6 RSV

Listen to Malachi

God says that Elijah also will be sent before the coming of Christ. The Lord Himself relates this prophecy to John the Baptist too (Matthew 11:14; compare Luke 1:17) while John says that he is not Elijah (John 1:21). This seeming contradiction is solved by the fact that His second appearing in glory for judgment will follow Christ’s rejection. So before this “great and dreadful day of Jehovah” will come Elijah will appear and announce the second coming of Christ for judgment (Revelation 11:3-6).