It is rarely assumed that not wanting to live might be part of wanting to live; or that finding one's life – or as it is usually generalised in such states of mind, finding life itself – unbearable may, in certain circumstances, be the sane option, the utterly realistic view.

[…] [A] capacity to be depressed means being able to recognise something that is true – that development involves loss and separation, that we hurt people we love and need – and have been prepared to bear the grief and guilt. In this sense depression makes us real. It deepens us.

[…] Seen through the prism of depression, sanity is always bound up with self-regard.

Adam Phillips