It is necessary for every servant who has? Iman and sincerity with himself to inspect his Iman; does his Iman grow; or does it wither?
The servant is in dire need to restore his Iman; take steps in perfecting it; being on one’s guard from things that decrease and weaken it, and make strides to strengthen it.
Iman is subjected to afflictions by numerous matters that decrease it; among them are trials of this life; Shaytan’s whispers, bad and corrupt companions; an evil soul that always calls to evil and so forth. So, one needs to take quick measures in strengthening and restoring it. “Indeed; the Iman in your heart wears out similarly to how a Thawb wears. So beg Allah to restore the Iman in your hearts.”
The Prophet (sallallahu ‘alayhi wa sallam) described Iman as to wear out the same way as a Thawb wears out; meaning it is subjected to deterioration; weakness; decrease due to disobedience; sins and conflicting diversions that keep him away from Iman; and hard trials that dwindle the strength and vigor of his Iman; and weakens its beauty; excellence; and splendor.