The title essentially says it all, but the slightly more expanded version is below:
The book stays pretty practical on the topic of suffering, ie. being light on the religious ideology. Actually the entire second half of the book is how to put mindfulness in practice, which I very much appreciate but am not super motivated to adopt. One idea I wasn't clear on is the distinction between joy and happiness, it was quickly explained as:
A mindfulness practitioner is able to generate joy or happiness. It is not hard. There’s a little difference between joy and happiness. Joy still has some of the element of excitement or anticipation in it. In happiness, there is ease and freedom.