Kenneth endured an unreasonably hellish training under Joseph just for the sake of inheriting his culinary arts. Not only Kenneth had to constantly endure the heat of the kitchen even though when he was sleeping.
Joseph also made him meditate every day according to some breathing techniques.
Joseph had consulted Pixie Fairy Elizabeth regarding this and she gave Joseph a set of breathing techniques that Kenneth could practice without becoming a cultivator.
But why didn't he just gave Kenneth a set of cultivation manuals?
It was because even though Joseph wanted Kenneth to control his Spiritual Energy in order to infuse them to mortal ingredients so, that they could become spiritual ingredients...
He didn't want Kenneth to be a cultivator.
