My spirit is pleased with knowledge...

It was reported by Ibn al Qayyim in his book: "Rawdatul Muhibeen",  I was informed by my Sheikh (Ibn Taymiyyah), he said: 

When I became sick the doctor said to me: Verily your research and Islamic lecturing increases your illness.  I (Ibn Taymiyyah) replied: I can not stop, and I will debate you in your knowledge! If a person becomes happy and joyful doesn't this strengthen their soul or spirit, and as a result wards off illness? The doctor responded: Of course.  So I (Ibn Taymiyyah) said: Verily my spirit is pleased with knowledge and it strengthens my nature and due to that I find relaxation.  The doctor responded: This is something our knowledge doesn't apply to.

("Radiant Pages From The (examples) of The Worship of The Scholars" - Mustafa George)