Mental conflicts arise when we try to balance too many variables... kind of like building a house.
Do you want it built fast, to a high quality or cost effective?
Fast + high quality = Expensive
Fast + cost effective = Low quality
High quality + cost effective = Sloooooooow
It's no different to everyday expectations. Sometimes you need to hold the discomfort to get what you want ...
And other times 2 out of 3 isn't so bad :)