When people are suicidal, their thinking is paralyzed, their options appear spare or nonexistent, their mood is despairing, and hopelessness permeates their entire mental domain. The future cannot be separated from the present, and the present is painful beyond solace. ‘This is my last experiment,’ wrote a young chemist in his suicide note. ‘If there is any eternal torment worse than mine I’ll have to be shown.

— Kay Redfield Jamison