Knowledge does not change behaviour. 
You give people all the knowledge in the world and they still make poor decisions. 

Most decision-making are emotional. 

Remember when you help yourself to another chocolate bar even though you wanted to go on a diet? We know that overeating is bad but we still can't help it. 

Remember the very first time that you ran around the block with the new fitbit on your waist? The purchase was emotional, you felt that you could be the lean, fit machine you always desire to be. The ray of hope that comes with a shiny new thing propels the very first action. 

To change hearts and minds, you need to start with the emotions, not knowledge.  

The change truly happens if you continue with the emotions, slow and gradual.