To play your edge means to always teeter on the brink of your comfort zone. I think of this like a circle. In the middle you’re warm, cozy, safe, not doing anything too risky (or fun). Step out a little further…and a little further and you’re at that painted yellow line.
You’re still safe behind that yellow line, but not quite as comfy as the middle. Go past the line, maybe stick your toes off the edge of the circle.
Here is where you kind of freak out a little, you’re not feeling safe, but you are doing something worth while. Eventually the circle grows past your toes and there you are, ready to step out a little more, lesson in hand.