Should I do reflection before eating if I don't plan to keep it

Should I do reflection before eating if I don't plan to keep it? There is an issue I'm aware of that you shouldn't say stuff you won't be able to do - I mean sometimes you can but that its better not to promise stuff you probably will fail doing (I don't want to give examples but it is a thing in Buddhism I hope some will know what I'm talking about) So my question is should one say a reflection on food ("I use this almsfood not for beautification but for supporting the holy life etc etc...") when he knows he probably isn't going to keep it? What about when he thinks there's a tiny chance he will? What about most likely will keep it?