If you can't, then you must!
Success is buried on the other side of rejection.
We look at what we do to determine who we are.
The only real security in life comes from knowing that every single day you are improving yourself in some way.
Lack of emotion causes lack of progress and lack of motivation.
If you're aware when it's going on, you can deal with it and change it. If you're not aware of it, you'll be mystified at the states that come and go seemingly without reason.