He is suffering a relapse after he repented

His Excellence Shaykh ‘Abd al-‘Azeez ibn Baaz
(may Allaah have mercy on him) was asked the following question:

I am a young man who has wronged myself by committing many sins. I do
not even pray in the mosque, I have never fasted all of Ramadaan in my life, and I do
other bad things. Often I have promised myself that I will repent, but then I go back to
my bad ways. I make friends with young people in our neighbourhood who are not very good,
and most of my brothers’ friends who come to our house are also not righteous. Allaah
knows that I have wronged myself by committing so many sins and doing bad things, but
every time I resolve to repent, I go back to my old ways again. I hope that you can show
me a way to get closer to my Lord and keep me from doing these bad things.

He (may Allaah have mercy on him) replied:

Allaah says (interpretation of the meaning):

“Say: “O ‘Ibaadi (My slaves) who have transgressed
against themselves (by committing evil deeds and sins)! Despair not of the Mercy of
Allaah, verily, Allaah forgives all sins. Truly, He is Oft-Forgiving, Most Merciful”
[al-Zumar 39:54]

The scholars agreed that this aayah was revealed concerning those who
repent; whoever repents sincerely from his sins, Allaah will forgive him all his sins, as
this aayah says, and as Allaah says elsewhere (interpretation of the meaning):

“O you who believe! Turn to Allaah with sincere repentance! It
may be that your Lord will expiate from you your sins, and admit you into Gardens under
which rivers flow (Paradise)” [al-Tahreem 66:8]

In this aayah, Allaah made the forgiveness of sins and admittance to
Paradise conditional upon sincere repentance, which includes giving up and avoiding sins,
regretting the sins of the past, and sincerely resolving not to go back to them, out of
reverence for Allaah, hoping for His reward and fearing His punishment.

One of the conditions of sincere repentance is that one should restore
what is rightfully due to people whom you have wronged or asking for their forgiveness if
the sin involved wronging them with regard to blood, wealth or honour. If it is not
possible to ask your brother for forgiveness concerning his honour, then you must pray for
him a lot, and speak of him in the best way you can in the places where you gossiped about
him, for good deeds expiate for bad deeds. Allaah says (interpretation of the meaning):

“… And all of you beg Allaah to forgive you all, O
believers, that you may be successful.” [al-Noor 24:31]. In this aayah, Allaah
made the connection between success and tawbah, which indicates that the one who repents
will be successful and blessed. If the one who repents follows his repentance with faith
and righteous deeds, Allaah will wipe out his sayi’aat (evil deeds) and
replace them with hasanaat (good deeds). Allaah says in Soorat al-Furqaan,
after mentioning shirk, killing without just cause and zina (unlawful sexual
intercourse) (interpretation of the meaning):

“The torment will be doubled to him on the Day of Resurrection,
and he will abide therein in disgrace; Except those who repent and believe (in Islamic
Monotheism), and do righteous deeds; for those, Allaah will change their sins into good
deeds, and Allaah is Oft-Forgiving, Most Merciful” [al-Furqaan 25:69-70]

One of the means of repentance is praying to Allaah for guidance and
strength, asking Him to bless you with repentance. Allaah is the One Who says
(interpretation of the meaning):

“And your Lord said: “Invoke Me [i.e. believe in My
Oneness (Islamic Monotheism) and ask Me for anything] I will respond to your
(invocation)…” [Ghaafir 40:60]

And He says (interpretation of the meaning):

“And when My slaves ask you (O Muhammad) concerning Me, then
(answer them), I am indeed near (to them by My Knowledge). I respond to the invocations of
the supplicant when he calls on Me (without any mediator or intercessor).”
[al-Baqarah 2:186]

Another of the means of repentance which will help you adhere to it is
keeping company with good people and following their example of righteous conduct, and
keeping away from bad company. It was reported in a saheeh hadeeth that the Messenger of
Allaah
(peace and blessings of Allaah be upon him) said:

“A man will be on the path of his close friends, so pay attention
to who you make friends with.”

And he
(peace and blessings of Allaah be upon him) said:

“The likeness of a righteous companion is that of the seller of
musk: either he will give you a gift, or you will buy something from him, or you will
smell a pleasant fragrance from him. And the likeness of an evil companion is that of the
man who works the bellows: either he will burn your garment, or you will smell an
unpleasant odour from him.”

(Majmoo’ Fataawaa Samaahat al-Shaykh ‘Abd al-‘Azeez
ibn Baaz; Fataawaa al-‘Aqeedah, part 2, p. 640)

With regard to renewing your Islam: if you have done something that
takes you out of Islam altogether, then you have to pronounce the Shahaadatayn and
re-enter Islam because you had left it. If what you have done is a major sin which does
not, however, take you out of Islam, then it is sufficient for you to repent according to
the conditions referred to above. Do not despair of the Mercy of Allaah; follow the path
of salvation. May Allaah give us and you the strength to do all that is good. May Allaah
bless our Prophet Muhammad.

We ask Allaah to bless us and you with sincere repentance and to forgive
us and you. May He show you the way out from your problem and bring us and you together in
Gardens of Delight (Paradise) facing one another on thrones [cf. Al-Hijr 15:47]. Ameen.