Perhaps one of the saddest emotions we can experience as humans is nostalgia. You know, the faint pain in your chest that longs to be back in the past with the memory you’ve just recalled.

It might be a smell or a taste or a view or a sound that takes you back to a moment somewhere in your sunny past, but whatever it is, nostalgia doesn’t hurt any less. And even though it ‘hurts’, it doesn’t hurt in the same way bad memories do.

That’s the thing about nostalgia: it’s always good memories. It’s the days with friends and family, times on holiday or when we’re solitary. Nostalgia is a bittersweet thing that bites us and paralyses us for a few minutes while we think of what we miss.

Nostalgia is about missing something; about missing the past. You don’t necessarily want to go back and relive your entire past, but you wish you could jump straight into that memory. You miss how it felt.

And maybe it’s an age thing. Nostalgia is something I’ve only started experiencing lately. It seems that the older you get, the more you miss what you once had.

So that’s why it’s important to tell people younger than us not that your teenage years are the best in their life, but to live in the moment. Tell them that when they do something great, stop videoing it on Snapchat and live it. Be there. Be present.

Photographs are lovely. As are videos. But they are taken through a lens. You can’t live life through a lens.

And without experiencing life first-hand, you can never be nostalgic. While it’s an unusual pain to have, it’s one that is necessary for it means that you have lived and loved well.