At any moment you could have a moment that you think about for the rest of your life.

Likewise any time you think about something from the past, it could be the last time you ever think of it.

i try very hard to not have experiences for this very reason!

And travel greatly increases this probability

At any moment you could have a moment that you think about for the rest of your life moments

Whenever you see someone, it could be the last time you see ^them^ in your life.

At any moment you could have the last moment of your life