Did Yeshua avoid the scribe because he was really tired and just
wanted to take a nap?
He actually is answering the scribe's question in a way that speaks directly to the scribe, but seems opaque to us.
We note that the scribe came to Jesus after he had done a great many miracles (Matthew 8:1-17). The scribe, being unbelieving and seeing such great multitudes come to him (8:18) presumes that Jesus must be making a great deal of money from all that he was doing. Jesus, knowing his true thoughts, tells the scribe that if he truly wants to follow, then he must be prepared to be so poor as to be homeless. We are reminded also of the story of the rich young man who went away dejected when Jesus told him that he must sell everything and give his possessions to the poor.
Is there any connection to Matthew 11:28 and Psalm 95:11 (also
Hebrews 4:5; 3:11)
Come unto me, all ye that labour and are heavy laden, and I will give you rest
(Matthew 11:28)
Unto whom I sware in my wrath that they should not enter into my rest
(Psalm 95:11; Hebrews 4:5; 3:11)
I am not sure that there is a direct allusion here, but I think we could certainly connect Matthew 8:19 to these two verses.
Matthew 11:28-29 concerns humility:
Learn from me, for I am meek and lowly in heart
Since humility has no room for avarice, we could certainly make a connection to Christ's admonition to the scribe.
Psalm 95 (94 LXX) is somewhat starker, beginning with an exclamation of joy and ending with one of fear. But I think the theme is similar: a battle between catering to one's own desires or humbling oneself before God and submitting oneself to God's will.
Who is the son of man in Matthew 8:20?
Jesus is certainly referring to himself in Matthew 8:20. Jesus uses this term over 80 times in the Gospels to refer to Himself. The very first time He used the expression seems to have been when He spoke with Nathaniel, who came to see Him at Philip's urging:
John 1:50–51 (KJV 1900)
Because I said unto thee, I saw thee
under the fig tree, believest thou? thou shalt see greater things than
these. And he saith unto him, Verily, verily, I say unto you,
Hereafter ye shall see heaven open, and the angels of God ascending
and descending upon the Son of man.
When Nathaniel said to Jesus, Rabbi, thou art the Son of God (John 1:49). He did not mean it in the sense of Peter's confession (Matthew 16:16-18), but rather in the sense that He was a man who by grace and virtue had been adopted as a Son of God. Jesus clarifies his Divinity to Nathaniel through a mild correction, since angels would not be ascending to a mere man. In other circumstances, however, Jesus uses the phrase "son of man" so as not to offend the Jews.
That Jesus meant Himself when referring to the "Son of Man" in Matthew 8:20, as well as in the parallel passage in Luke, 9:58, is affirmed by numerous Church Fathers:
Cyril of Alexandria, Commentary Upon the Gospel According to St. Luke, Part I, Sermon LVII
John Chrysostom, Homily XXVII on the Gospel According to St. Matthew; Homily I on the Acts of the Apostles; Homily XXXI on the Gospel According to St. John; Homily XVIII on the Epistle to the Hebrews
Isaac the Syrian, Ascetical Homily LXXVII
Theophylact of Ohrid, An Explanation of the Holy Gospel According to St. Matthew