"Oxygen is free, I can breathe!" Well no, it takes calories to move your lungs and oxygen is also corrosive to the body and can cause cancer. That's why we have antioxidants.
This is something I was thinking about today
I thought about it during the whole "talk is cheap" saying too in relation
A romantic relationship. They take a lot of maintenance, but they are amazing.
I think the best things in life need to be worked at and kept up or else they fall apart.
Well the saying doesn't mean money explicitly, all it's saying is that if something is free, be that monetary or otherwise, then it's one of the best things something in life can be