Healthy choices come naturally to me.

Natural is a thing that gets built. You don't think about the seatbelt anymore, but there was a stretch of years when you did, when someone had to say it every single trip.

The same conversion happens with a walk after lunch, or leaving the phone in another room overnight. For about six weeks it costs effort every time. Then one morning it costs nothing and you can't identify the day it changed. If a choice still costs you, you're not failing at it. You're inside the six weeks.