Time

 I think the hardest part to accept as an adult, is that time is not your friend. 

When you're young, you think you have time. Time to work. Time to save. Time to dream. Time to do that one thing you have always wanted to but just don't have the (insert reason) to do it now. But as you age, as the time marches on, you realize time is not your friend. And if you don't do the things you set out to, then you are left behind wondering....

Of course that does not mean life has to be a big bag of regrets. That's not what I mean. I just wish I knew at 22 that forever isn't really forever. I should have started saving more. I should have started working out every single time I set out to. I should have cherished the moments with family and friends as time spun past me. I can't go back in time, that is the other cruel realization. However, I can make the time from right now, mean something so that when I'm 66, I can say, I did it. I appreciated the time. I learned to make it work for me and I have had a good time.