But given that we humans have the ability to conjure up a vision of the future, it's better that it's a positive one. In fact, it seems to be vital that it is: Despair, depression, and ultimately suicide are marked by a lack of a positive view of the future, or indeed any view of the future at all.
So how does this useful delusion develop?
The obvious conclusion is that the past predicts the future, and there is some truth to that. If we grow up in - or even as adults experience - a lot of adversity that can certainly suck the hope out of us. It can leave us believing that bleakness is the constant.
But many people grow up with plenty of adversity and also find ways to maintain a sense of hopefulness.
So think about what we do with young children: When they come to us with their fears and worries we scoop them up and tell them everything is going to be alright.
We plant the seeds of hope.
• Break The Silence: See the full series here
• Break The Silence: Q&A on Herald special series
As parents, we know we can't actually guarantee that everything will be alright. We know we don't know what the future holds. We might be frightened, worried, upset ourselves. But we don't say any of that.
We hold them tight and we say everything is going to be okay.
The seeds of hope grow in love, and it is love (or connection if you prefer the less sentimental version) that enables hope to flourish.
Disconnection, feeling unloved - or unlovable - ultimately leads to despair.
This week New Plymouth Boys High School Headmaster Paul Veric took the courageous step of talking to his students about mental health and suicide.
He also talked about the importance of love.
Love is a word you need to understand. You need to get comfortable with it. If we have any chance of reversing the trend of young people feeling helpless, we have a greater chance of overcoming it by caring for each other.
His full speech is on the school's Facebook page. It has gained national attention and praise from mental health campaigner Mike King, who recently spoke at the school.
We all need to understand love better. And we all need to put love back in the centre of our conversations with families, communities and at a political level.
I applaud the New Zealand Herald for its Break the Silence series of stories. As a country we need to talk more about suicide.
But let's also Break the Silence on love. Because without love, there is no hope. Without hope we will keep losing our young people to suicide, and when we lose them, our country loses its future.
WHERE TO GET HELP:
If you are worried about your or someone else's mental health, the best place to get help is your GP or local mental health provider. However, if you or someone else is in danger or endangering others, call police immediately on 111.
OR IF YOU NEED TO TALK TO SOMEONE ELSE:
• LIFELINE: 0800 543 354 (available 24/7)
• SUICIDE CRISIS HELPLINE: 0508 828 865 (0508 TAUTOKO) (available 24/7)
• YOUTHLINE: 0800 376 633
• NEED TO TALK? Free call or text 1737 (available 24/7)
• KIDSLINE: 0800 543 754 (available 24/7)
• WHATSUP: 0800 942 8787 (1pm to 11pm)
• DEPRESSION HELPLINE: 0800 111 757