Study of Matthew 8:18-22 . What is the point of these scriptures?

Matthew 18-22.....18 When Jesus saw the crowd around him, he gave orders to cross to the other side of the lake. 19 Then a teacher of the law came to him and said, "Teacher, I will follow you wherever you go." 20 Jesus replied, "Foxes have holes and birds of the air have nests, but the Son of Man... show more Matthew 18-22.....18 When Jesus saw the crowd around him, he gave orders to cross to the other side of the lake. 19 Then a teacher of the law came to him and said, "Teacher, I will follow you wherever you go."
20 Jesus replied, "Foxes have holes and birds of the air have nests, but the Son of Man has no place to lay his head."
21 Another disciple said to him, "Lord, first let me go and bury my father."
22 But Jesus told him, "Follow me, and let the dead bury their own dead."

Why are these verses in the bible ?
What can we learn from them ?
Can you share any relevant scriptures or add any comments to explain these verses ?
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