Pessimists beat their heads against walls, while optimists open doors.
This world will slam doors in your face at every opportunity. Be willing to employ a foot when necessary.
The most staunchly determined are but quitters of the right things.
When progress is in short supply bring a surplus of determination.
When crushed to your knees, it is best to dig in your heels.
Look for goodness in others, for beauty in the world, and for possibilities in yourself.