responsibility in this regard is to keep reminding him gently and patiently
whenever the time is appropriate. You should continue with this as long as you
can. If he does not listen or does not mend his ways, then making him do so or
forcing him is not your responsibility at all. In fact, it is not allowed by
Islam. Your friend must practice Islam of his own free will, and if he does not,
then he alone will have to face the consequences and not you of course.
We know from
the Qur’ān that the Prophet (sws) was very anxious and concerned on the evasive
attitude of his people. His extreme desire for them to accept faith finds
mention at a number of places in the Holy Book. At some of these places, he has
been comforted, in fact affectionately chided by the Almighty that making people
accept faith is not his duty. His responsibility is only to present guidance to
them. It is Allah alone who gives guidance to people according to His law: He
only guides people who are worthy of being guided; the rebellious He guides not.
(See for example: 16:37, 28:56, 88:21-2).
So, I would I
advise you to keep urging and exhorting your friend to the truth. Also, in this
regard, you will find it useful to begin first with nurturing in him love for
the Almighty and with reminding of him of the Hereafter. Once his concepts are
set right in these spheres, following the directives of the Almighty will
hopefully become easier for him.