A mood disorder is dangerous. You've got to get those dramatic waves of highs and lows stabilized. It's dangerous if you don't.

You can't let the highs get too high and you can't let the lows get too low.

I think the highest and lowest points are the important ones. Anything else is just...in between.

To get 50 caps you have to go through highs and lows - and I certainly had a few - it has never been rosy but to be still here, as well as enjoying good times at Celtic is very pleasing.

Everything I know now . . . the pitfalls, the highs and lows, everything . . . it taught me and made stronger.

Unfortunately in sport it's either good or bad. You've got to take the highs and the lows.