Apathy is the lowest emotion. Anger and revenge are higher emotions.

However, anger is seen as a bad emotion, because the person will often lash out.

So, we give them anti-depressents (I mean, depressents) which takes them from a higher state, to the lowest state, apathy. But, at least they aren't a danger to others, right?

A person who will commit suicide is in the emotional area of apathy.
And so, to save them, you have to get them up. If they start getting angry, they will not commit suicide.

Up past anger, through overwhelment into the higher emotions where they feel they have a future. Then you know they are on a good path.

So, if you have a friend who you believe is suicidal, start talking about the future. If they feel they don't have a future, they may truly, very shortly, not have a pulse.