As has been alluded to earlier, a Muslim should never be complacent with respect to his faith. Faith increases and decreases. The Messenger of Allah (peace and blessings of Allah be upon him) said, “By the One whom there is no other God, one of you does the actions of Paradise until there is just a hand’s span between him and Paradise and then the Book [pre-ordainment] overtakes him and he does the actions of the people of Hell and he enters into it.”
A Muslim must be very clear about his goal in life. When he is clear about his goal in life, he must be able to identify the means and measures that will assist him to meet that goal. Similarly, he must be aware of the impediments and harmful aspects that harm him with respect to his goal. Finally, when he does slip, he needs to know the best way that will put him, Allah willing, right back on the proper track.