This was a game changer for me. I cite him often in my essays geared toward suicide attempt prevention. This long one is actually my most read and engaged with piece: https://medium.com/illumination/dizain-of-suicide-72bcde4dc8d8

I also frequently cite this quote from the book in other philosophical essays of mine: "Everything can be taken from a man but one thing: the last of human freedoms--to choose one's attitude in any given set of circumstances, to choose one's own way...between stimulus and response there is a space. In that space is our power to choose our response. In our response lies our growth and our freedom."