A certain man - He was a scribe. See on Matthew 8:19-22 (note). It is probable that this took place when Christ was at Capernaum, as Matthew represents it, and not on the way to Jerusalem through Samaria.

a certain.

Exodus 19:8 And all the people answered together, and said, All that the LORD has spoken we will do...

Matthew 8:19,20 And a certain scribe came, and said to him, Master, I will follow you wherever you go...

John 13:37 Peter said to him, Lord, why cannot I follow you now? I will lay down my life for your sake.

September 15 Evening
A double minded man is unstable in all his ways.--JAS. 1:8. No man, having put his hand to the plough and looking back, is fit for the kingdom of God. He that cometh to God must believe that he is, and that he is a rewarder of them that diligently seek him.--Let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed. For let not that man think that he shall receive anything of the Lord.--What things soever ye desire, when ye pray, believe …
Anonymous—Daily Light on the Daily Path

Christ's Cross and Ours
'And it came to pass, as He was alone praying, His disciples were with Him; and He asked them, saying, Whom say the people that I am I 19. They answering, said, John the Baptist; but some say, Elias; and others say, that one of the old prophets is risen again. 20. He said unto them, But whom say ye that I am? Peter answering, said, The Christ of God. 21. And He straitly charged them, and commanded them to tell no man that thing; 22. Saying, The Son of man must suffer many things, and be rejected …
Alexander Maclaren—Expositions Of Holy Scripture

'In the Holy Mount'
'And, behold, there talked with Him two men, which were Moses and Elias: 31. Who appeared in glory, and spake of His decease which He should accomplish at Jerusalem.'--LUKE ix. 30, 31. The mysterious incident which is commonly called the Transfiguration contained three distinct portions, each having its own special significance and lesson. The first was that supernatural change in the face and garments of our Lord from which the whole incident derives its name. The second was the appearance by His …
Alexander Maclaren—Expositions Of Holy Scripture