On Commitment ?

I suspect this veganism adventure is somewhat like marriage.
Hear me out.
It’s a commitment I made on a certain day to live my life a certain way from here on out. I’ve noticed that the commitment can become old news quite quickly (it’s only been 2 months.) I find myself following the letter of the law instead of the heart, as my father is fond of saying. When I drive 10 extra miles to pick up a carton of soy ice cream, that defeats the purpose of not buying cow milk ice cream in the first place. I’ve chosen to live this way because it’s something I can do every day to help reduce my impact on the earth we share with a zillion other needy creatures (slightly defensive sidenote: I’m not just a soppy tree hugger, I swear; whether I believe other species are inherently valuable or not (I do), anthropocentric thinkers should be reminded that probably every species in our ecosystem has or will eventually have an impact on humans if their numbers dwindle or fizzle out).
If I remind myself that every meal is a choice to live what I believe, every meal becomes a tiny victory and choices like whether to drive to the store to get ice cream become… if not easy, then certainly clear with regards to my personal morals. If I just think of my dining choices as “something I do” or worse, being ‘vegan’ as “something I am”, my meal decisions become automatic and I make stupid choices in other areas of my life, forgetting why I took the leap in the first place.
Marriage has got to be something like that. While I’m sure in many cases the reasons one stays married are different from the reasons one got married, there’s got to be a regular reminder about the heart and intention behind choosing every day to come home to the same person, or one starts to make stupid decisions and forget the value and joy in choosing daily to fulfill an old commitment. I suspect.