It is different for every person. It is like asking will a person ever get to the point where they will feel perfect peace all of the time? It is possible for everyone. It is a matter of spiritual growth. For the animal, eating and sex is what makes them happy.
The human has a divine soul but can ignore it. Ignore is the root word of Michael Jackson's favorite word-- ignorant. "Michael, what do you say about the people that say..." Michael: "They are ignorant!"
Jesus, Moses and Mahatma (Hindi for great soul) Gandhi were known more for things other than fasting. Gandhi ended the war between the Muslims and Hindus.