Out of the comfort zone

 David Bowie

If you feel safe in the area that 

You're are working on

You are not working in the right area;

Go a little further into the water 

than you are capable of being in

Go a little bit out of your depth

 and when you dont feel that,

Your feet are quite touching the bottom, 

You are just about the right place 

To do something exciting;

David Bowie