Iain O'Brien was in the midst of a university project on the not-so-celebrated topic of chlamydia when he had his epiphany.
Each person in the class had to present a discussion on a disease; a colleague chose depression. O'Brien, 37, who played 22 tests for New Zealand from 2005 to 2009, didn't even think depression was a disease. It wasn't until an OHP slide highlighting its symptoms was displayed that a few things started to make sense.
"It sort of explained what was going on," O'Brien said. "It didn't really change anything; it just meant I had a name for it. As a sportsman, you want a name for everything, for every injury."
Still, it wasn't until two years ago that O'Brien was driven to do anything about it. Living in Britain while trying to carve out a post-international county career with Leicestershire, the seam bowler was struggling with injuries - one of the most common precursors to mental health issues - and was quick to temper.
He didn't like the person he was becoming, but even then couldn't make the call, leaving it to his wife to set the ball rolling. After a false start, the O'Briens found a counsellor who could push the right buttons.