He didn't actually repent if he intended to keep on doing what he was doing. Now, if he is trying to improve, but occasionally fails, he will need to keep working on it.
That sounds plausible. The heathens in Nineveh repented upon the preaching of Jonah, which appears to be a 1 time thing.
STRONGS NT
3340: μετανοέω
μετανοέω, μετάνω; future μετανοήσω; 1 aorist μετενόησα; from (Antiphon), Xenophon down; the Sept. several times for נִחַם; to change one's mind, i. e. to repent (to feel sorry that one has done this or that,
Jonah 3:9), of having offended someone,
Luke 17:3f; with ἐπί τίνι added (the dative of the wrong, Hebrew עַל,
Amos 7:3;
Joel 2:13;
Jonah 3:10;
Jonah 4:2),
of (on account of) something (so Latinme paenitet alicujus rei),
2 Corinthians 12:21; used especially of those who, conscious of their sins and with manifest tokens of sorrow, are intent; on
obtaining God's pardon; to repent (Latinpaenitentiam agere): μετανοῶ ἐν σάκκῳ καί σποδῷ, clothed in sackcloth and besprinkled with ashes,
Matthew 11:21;
Matt 12:41
The men of Nineveh shall rise in judgment with this generation, and shall condemn it:
because they repented/metenohsan<3340> at the preaching of Jonas
and behold! a greater than Jonas is here.
Luke 11:32
The men of Nineveh shall rise up in the judgment with this generation, and shall condemn it: for
they repented/
metenohsan<3340>at the preaching of Jonas;
and behold! a greater than Jonas is here.
Those in Revel 16 did not repent upon the preaching of Jesus and I would have to assume these are believers in GOD but not in Jesus [such as Jews and Muslims?] Just kicking that out there.
Revelation 16:11
And they blaspheme the GOD of the heaven out of the miseries of them, and out of the sores of them.
And not they repent/metenohsan <3340> (5656) out of the works of them.
........
for they repented at the preaching of Jonas, and behold a greater than Jonas is here: what in this case will aggravate the condemnation of the Jews in the day of judgment is, that these men were Heathens, aliens from the commonwealth of Israel, and strangers to the covenants of promise, and were not used to have prophets sent to them; and yet as soon as Jonas, a mere man, came to them, and preached but one sermon among them, they repented of their sins, and turned from them;
whereas the Jews, who had a better notion of religion, and who, though they had the Son of God himself among them, and preached to them, and that many sermons, and whose ministry was confirmed by miracles, and afterwards his apostles for a course of years, had yet remained impenitent and unbelieving;
.....Because they repented at the preaching of Jonas and, behold, a greater than Jonas is here. Jonas was a stranger to them, he wrought no miracles amongst them to confirm that he was sent of God, he only came and cried, Yet forty days, and Nineveh shall be destroyed;
yet they repented, if not truly and sincerely, yet in appearance; they showed themselves to be affected with what Jonah said, his words made some impressions upon them, as that the king arose from his throne, laid his robe from him, covered him with sackcloth, and sat in ashes, called a fast, as
Jonah 3:5-8.
But, saith our Saviour, I am greater than Jonah: I was long since prophesied of, and foretold to this people, to come; I am come; I have preached amongst them, and not only preached, but wrought many wonderful works amongst them, yet they are not so much affected as to show the least signs of repentance.