Muslim Soul
It is imperative for us to build the levels of knowledge and action upon a firm, strong foundation, and that is the saying of the Messenger of Allah sallallaahu 'alayhi wa sallam, "From a man's perfecting his religion is his leaving alone that which does not concern him". (Ahmad in his Musnad, at-Tirmidhi, Ibn Majah and others, Sharh Aqeedah at-Tahawiyah, no.268)