There's a line from the song Smile:
... smile through your fear and sorrow
that ran around my head today. I also have just DO it as my personal internal mantra during tough times. I realize it's been used elsewhere, don't worry I have a little TM superscripted in my head too.
I used to think that the whole idea of just pushing through something, of smiling now and things will get better later was simply a way of ignoring the pain or anxiety. I now see the value of just getting through, of taking a deep breath and jumping off or running through. You learn - by experiencing it directly - that you can get through something uncomfortable and survive till that next day.
It's one thing doing it yourself. It's another whole ball of wax to watch one of your children experience it themselves. This has been, by far, the toughest part of being a Mum. Hopefully I'm able to provide some guidance so he's not left to fend for himself like I was.
(don't worry, gin helps)