How do the two verses about the regeneration tie together in your view?
Mat 19:28 (KJV) And Jesus said unto them, Verily I say unto you, That ye which have followed me, in the regeneration when the Son of man shall sit in the throne of his glory, ye also shall sit upon twelve thrones, judging the twelve tribes of Israel.
Tit 3:5 (KJV) Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;
Here are some interesting views on Matthew 19:28. I pretty much agree with these, though I am not entirely certain
That ye which have followed me, in the regeneration - This word occurs but once elsewhere in the
New Testament,
Titus 3:5. It literally means a new birth, or being born again. Applied to man, it denotes the great change when the heart is renewed, or when the sinner begins to be a Christian. This is its meaning, clearly, in the passage referred to in Titus; but this meaning cannot be applied here. Christ was not born again, and in no proper sense could it be said that they had followed him in the new birth; but the word also means any great change, or a restoration of things to a former state or to a better state. In this sense it is probably used here. It refers to that great revolution - that restoration of order in the universe - that universal new birth which will occur when the dead shall rise, and all human things shall be changed, and a new order of things shall start up out of the ruins of the old, when the Son of man shall come to judgment. The passage, then, should be read, "Ye which have followed me shall, as a
reward in the great day of the resurrection of the dead, and of forming the new and eternal order of things - the day of judgment, the regeneration - be signally honored and blessed.(Barnes notes)
In the regeneration; that is, in the day of judgment, when Christ shall come in his glory. The apostle indeed,
Acts 3:21, calleth that day, the times of restitution of all things. And the prophet speaks of it as the time of the new heavens and new earth,
Isaiah 66:22. So doth the apostle,
2 Peter 3:13; and John, in
Revelation 21:1. It is not much material to which part we apply the term. (Matthew Poole)
in the regeneration) This is to be construed with the following, not the preceding words: for the following after Jesus is usually mentioned alone, without this addition: by which the time of the session, which is immediately spoken of, is suitably marked. There will be a new creation, over which the second Adam will preside, when the whole microcosm of human nature, by means of the resurrection, and also the macrocosm of the universe, will be born again (genesin iteratam habebit). (Bengal)
In the regeneration. The final restitution of all things. (Vincent)