Once Hazrat Haatim Asamm رحمه الله addressing a gathering of Ulama said; “If there are three attributes in you, then you are safe otherwise Jahannum is compulsory for you.
One: Regret for the day which passed you without you having been able to offer much Ibaadah nor could you avoid sins. If you endeavour today to compensate for yesterday’s lapse, then when will you compensate for today’s loss?
Two: Regard today as an opportunity to please Allah Ta‘ala جل جلاله and to displease the enemies – the Nafs and Shaitān.
Three: Fear for tomorrow. Will tomorrow be destruction or salvation.”
That is, will you remain a Mu’min or become a Kaafir. No one has any guarantee for his Īmān. What the morrow holds, in unknown to us. Sayyiduna Rasoolullah صلى الله عليه وسلم said; “Īmān is suspended between fear and hope.”
(SOURCE: THE SAADIQEEN)

