I'm not sure of the exact definition of a motto, but I'll give it a try:

1. The Devil is in the details.

2. You never hit rock bottom, it can always get worse. Someone is always worse off than you, truly, so stop pitying yourself. Self-pity is a mean downward spiral - most people don't realize it's potential to cause havoc.

3. Nothing's ever so bad, it's good for nothing.