Hazrat Hakeemul Ummat Mawlana Ashraf Ali Thanawi ra told the following incident in one of his discourses: 

“An individual approached a religious scholar (‘alim) with the question regarding the status of emaan (faith/belief) of our master Prophet sallalaho alehey wa alehi wasalam’s parents. That is if they were Muslim or not?

The alim saheb asked the inquirer do you know the faraiz (essentials) of namaz (salah)?
He replied that he did not know them.
Disapproving of this attitude, the scholar rebuked him. Salah will be the first thing to be evaluated on the Day of Judgment. It is grossly erroneous not to be aware of the faraiz of namaz, which one has to perform five times daily. There is a great chance that by not having knowledge of them one will ruin his salah.
However, (being so neglectful of essentails) one is doing research regarding the emaan of our master Prophet sallalaho alehey wa alehi wasalam’s parents. This is for sure a matter neither will we be questioned on the Day of Judgment about nor any of our worldly affairs depends on.”
(Ar rafiq fi sawa etareeq 22)

As has be reported by the truthful & trustworthy our master Prophet sallalaho alehey wa alehi wasalam’s : The beauty of one’s Islam is to leave what does not concern him.

For us, who are on tareeq and trying to develop a relationship with our Lord SWT, daily reading from Bashiti Zewar and mawaiz/malfoozat of Mawlana Ashraf Ali Thanawi ra is necessary to develop the essental understanding of our deen.
Wa ma taufiqi ila billah