Contentment is positive. It is the feeling that even though life is tough you still appreciate what you have. You accept the things you can’t change, and you calmly begin to address those you can.
Complacency is contentment’s ugly cousin. It’s being okay being not okay. It’s accepting or complaining about your problems with no drive to correct them.
Signs you’re complacent: you don’t care for your body, you live with a sense that life is just hard, you seem to be constantly frustrated, you argue all the time, you think you’ve got it all figured out, you’re one of the quarter of American adults who didn’t read a book last year or, generally, you don’t value learning at all – which is just another word for growing as a person.