Faith is not that which can come to an end, this is the first thing. Every time your faith shakes, your devotion will be renewed from within once again.
Longing for the divine will keep you away from all other bad habits in life.
You have to come out of inertia. Because of inertia we lose so many things in life. Correcting food habits helps you come out.
All good qualities that you see in the world today come from the divine. And bad qualities or habits come from an ignorance of the divine.