This is Elias, which was for to come - This should always be written Elijah, that as strict a conformity as possible might be kept up between the names in the Old Testament and the New. The Prophet Malachi, who predicted the coming of the Baptist in the spirit and power of Elijah, gave the three following distinct characteristics of him. First, That he should be the forerunner and messenger of the Messiah: Behold I send my messenger before me, Malachi 3:1. Secondly, That he should appear before the destruction of the second temple: Even the Lord whom ye seek shall suddenly come to his temple, ibid. Thirdly, That he should preach repentance to the Jews; and that, some time after, the great and terrible day of the Lord should come, and the Jewish land be smitten with a curse, Malachi 4:5, Malachi 4:6. Now these three characters agree perfectly with the conduct of the Baptist, and what shortly followed his preaching, and have not been found in any one else; which is a convincing proof that Jesus was the promised Messiah.

if.

Ezekiel 2:5 And they, whether they will hear, or whether they will forbear...

Ezekiel 3:10,11 Moreover he said to me, Son of man, all my words that I shall speak to you receive in your heart, and hear with your ears...

John 16:12 I have yet many things to say to you, but you cannot bear them now.

1 Corinthians 3:2 I have fed you with milk, and not with meat: for till now you were not able to bear it, neither yet now are you able.

this.

Matthew 17:10-13 And his disciples asked him, saying, Why then say the scribes that Elias must first come...

Malachi 4:5 Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the LORD:

Mark 9:11-13 And they asked him, saying, Why say the scribes that Elias must first come...

Luke 1:17 And he shall go before him in the spirit and power of Elias, to turn the hearts of the fathers to the children...

John 1:21-23 And they asked him, What then? Are you Elias? And he said, I am not. Are you that prophet? And he answered, No...

Revelation 20:4 And I saw thrones, and they sat on them, and judgment was given to them...

John's Doubts of Jesus, and Jesus' Praise of John
'Now when John had heard in the prison the works of Christ, he sent two of his disciples, 3. And said unto Him, Art Thou He that should come, or do we look for another? 4. Jesus answered and said unto them, Go and shew John again those things which ye do hear and see: 5. The blind receive their sight, and the lame walk, the lepers are cleansed, and the deaf hear, the dead are raised up, and the poor have the gospel preached to them. 6. And blessed is he, whosoever shall not be offended in Me. 7. …
Alexander Maclaren—Expositions of Holy Scripture

Again on the Words of the Gospel, Matt. xi. 28, "Come unto Me, all Ye that Labour and are Heavy Laden, and I Will Give You
1. It seems strange to some, Brethren, when they hear the Lord say, "Come unto Me, all ye that labour and are heavy laden, and I will refresh you. Take my yoke upon you and learn of Me, for I am meek and lowly in heart, and ye shall find rest unto your souls. For My yoke is easy and My burden is light." [2323] And they consider that they who have fearlessly bowed their necks to this yoke, and have with much submission taken this burden upon their shoulders, are tossed about and exercised by so great …
Saint Augustine—sermons on selected lessons of the new testament

The Sinner's Friend
"Savior of sinners they proclaim, Sinners of whom the chief I am." What the invidious Jews said in bitter spleen, has been turned by the Holy Spirit to the most gracious account. Where they poured out vials of hate, odours of sacred incense arise. Troubled consciences have found a sweet balm in the very sound. Jesus, "the friend of publicans and sinners," has proved himself friendly to them, and they have become friends with him; so completely has he justified the very name which his enemies gave …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 10: 1864