Matt. 19:30 But many that are first shall be last; and the last shall be first.
Matt. 20:16 So the last shall be first, and the first last: for many be called, but few chosen.
I'm not sure what you interpetation you are looking for but I included a couple of different Commentaries, hope these help.
John Gill Exposition explaine the verses in this manner:
the apostles, who were last in this world, being poor, mean, and abject, should be the first in the other: or to the Scribes and Pharisees, who were in the chief place, and highest esteem, in the Jewish church, and yet least in the kingdom of heaven; when, on the other hand, the publicans and sinners, who were in the lowest class, and in least esteem, went first into it: or to the case of persecution, when some, who seem most forward to endure it at a distance, when it comes nearer, are most backward to it; whilst others, who were most fearful of it, and ready to shrink at the thoughts of it, most cheerfully bear it: or to the apostles themselves, one of which, who was now first, Judas, should be last; and the apostle Paul, who was last of all, as one born out of due time, should be first: or to Jews and Gentiles, intimating, that the Jews, who were first in outward privileges, would be rejected of God for their unbelief, and contempt of the Messiah; and the Gentiles, who were last called, should be first, or chief, in embracing the Messiah, professing his Gospel, and supporting his interest. This sentence is confirmed, and illustrated, by a parable, in the following chapter.
John Wesley:
Verse 30. But many first - Many of those who were first called, shall be last - Shall have the lowest reward: those who came after them being preferred before them: and yet possibly both the first and the last may be saved, though with different degrees of glory. Matthew 20:16; Mark 10:31; Luke 13:30.
