How many of us put emphasise on our exterior whilst totally neglecting the interior! Our hearts are full of jealousy, envy, arrogance and self amazement! The heart is a Science just like studying Fiqh, Usool, Hadith and others. Yet, how few of us study the heart in our times!
Some scholars have said that studying the heart is a lost science! Few teach it and from them, even fewer know it themselves.