The Need For Wisdom and Knowledge

Fath al-Mawsuli (Allah have mercy on him) said:
Doesn’t a sick person who is deprived of food and drink die?… It is the same with the heart: if it is kept from wisdom and knowledge for three days, it dies….”

Imam Ghazali (Allah have mercy on him) comments:
He has spoken the truth, for the nourishment of the heart is knowledge and wisdom, and it is through them that the heart has life.

[Ghazali, Ihya’ `Ulum al-Din, 1.7]