بِسْمِ اللهِ الرَّحْمنِ الرَّحِيمِ
"Knowledge is of two types: 1. Knowledge that penetrates into the heart; this knowledge is beneficial. 2. Knowledge, that is merely on the tongue; this will be Allah's evidence against the son of Adam.
Note: Knowledge of the tongue is referring to knowledge without practice and sincerity.
May Allah make us amongst those who seek knowledge that penetrates the heart.