I want to address this post specifically because I think people package these two ideas together all the time, either intentionally or unintentionally. It's like, yay gratitude, we all champion it and how positive and powerful it can be. And people will talk about being more grateful, well the easiest way to practice more gratitude in general is basically being grateful of smaller and smaller things until you're just trying your darnedest to be consciously and perpetually grateful from dawn to dusk. And with that reframing of mindstate, where maybe you are successful about just living in a totally blissed out feeling all the time, gee I bet you could hack your brain to feel on the inside how some religious fundamentalists act on the outside. I think this is definitely more possible for some people and less so for others, yet I also think a majority people could improve their overall mood by SOME degree simply by focusing on the positive. Whether or not we can transcend all the way up to joy over good oatmeal is another thing...
I know that recently, in my learning of how to be content more consistently, I'm trying to work on being "unbothered" by whatever I can assess as "unsurprising," and if something's not a surprise, literally, I do my best to refuse to be bothered by it. Someone is rude out in the world? Not surprising. Family moved my cup from its normal place and I can't find it? Not surprising. Store raised its prices? Not surprising. I'm doing my best to raise my game in this way now, so that unsurprising things, no matter if they would normally bother me, no longer distract from my enjoyment of the day. It's also fun in that I give myself permission to be upset at things that surprise me, as that feels more rational. The quota of self-pity must be small, but it does exist.