Paul's letters are a good testament to his life.
Believers generally agree that the LORD appointed Saul~Paul as His special Apostle to the Jews first and then the Gentiles (
Galatians 1:1;
1 Corinthians 9:1;
Acts 26:16–18). There are others in the early church referred to as “apostles” (
Acts 14:4,
14;
Romans 16:7;
1 Thessalonians 2:6), but only in the sense that they were appointed, authorized, and sent as ambassadors of the Lord on special errands/appointments. These Believers bore the title “apostle” in a limited sense not having walked with Yeshua. Judas Iscarot was one of the original "disciples," but never achieved the status of an "apostle." The word "Apostle" was used after the risen Lord appeared to his disciples and commissioned them to proclaim the Good News.
I don't think Jesus wrote any letters.
What about the recorded [red letter] Words spoken by Jesus in the Gospels? What about the transcribed Words of the Lord in the Book of Revelation? Believers agree that the inspired Words of the Prophets in the Tanakh and the inspired Words of the Apostles in the B'rit HaKodash are the transcribed Words of Adonai. According to the fifth Book of the NT (Acts of the Apostles
) Paul would be considered an Apostle.
Yes, many can nit pick on the definition of an "apostle" and the accuracy of some translations, but overall the Lord God watches over His Word to perform it (Jeremiah 1:12). Those that miss the mark may put forth excuses that they were confused by all the manmade interpretations, manmade traditions, business of the world, hypocrisy, etc, etc, etc. For those that have so many excuses why didn't they "study the Word (especially the Jewish B'rit Chadash) to show thyself approved" (2 Timothy 2:15) ). Especially if they knew enough to recognize that something wasn't right (e.g. manmade traditions, hypocrisy, etc.).
Jeremiah 1:12
Then
Adonai said to me, “You have seen well, because I am watching to fulfill my Word.”
John 1:1-5
1 In the beginning was the Word, and the Word was with God, and the Word was God.
2 The same was in the beginning with God.
3 All things were made by Him; and without Him was not any thing made that was made.
4 In Him was life; and the life was the light of men.
5 And the light shineth in darkness; and the darkness comprehended it not.
John 1:10-14
10 He was in the world, and the world was made by Him, and the world knew Him not.
11 He came unto his own, and His own received Him not.
12 But as many as received Him, to them gave He power to become the sons of God, even to them that believe on His name:
13 Which were born, not of blood, nor of the will of the flesh, nor of the will of man, but of God.
14 And the Word was made flesh, and dwelt among us, (and we beheld His glory, the glory as of the only begotten of the Father,) full of grace and truth.
John 21:25
25 But there are also many other things Yeshua did; and if they were all to be recorded, I don’t think the whole world could contain the books that would have to be written!
The LORD GOD Bless You Abundantly With His LOVE