They can because they think they can.
I am the greatest!
Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude.
We are what we repeatedly do. Excellence, therefore, is not an act but a habit.
We are what we think.
Our greatest glory is not in never falling but in rising every time we fall.
Victory belongs to the most persevering.
It's not the size of the dog in the fight, but the size of the fight in the dog.
It's never too late to be what you might have been.
We tend to get what we expect.
Norman Vincent Peale