Recently I had a rather sad reflection concerning age. Maybe it's depressing February, I don't know.
The perception of time changes as you grow older. Time is fast when you 21, you can be different person within few months. Reflecting 10 years back is looking over half of your life. You can easily say that everything you know about the world happened within those 10 years. At the same time future is so slow. You can't wait to grow older to do this and that.
When you 70 and you look back, ten years it's nothing. After you counted seven decades you realise how fast time passes. The horrifying thought is that you left to live 10-15 years. Which will fly so fast you won't notice. On the bright side, when you old present usually is very slow. So, that is I guess a compensation for fast approaching end.
When you young present is fast, past was taking forever and future is an illusive utopia. When you old present is very slow, past went so fast you can't say if it really happened and future feels so real like an enormous wall about crush over your head.