Be kind whenever possible. It is always possible.
Be thine own palace, or the world's thy jail.
By failing to prepare, you are preparing to fail.
To know oneself, one should assert oneself.
The wise does at once what the fool does at last.
Know or listen to those who know.
After a storm comes a calm.
Be gentle to all and stern with yourself.
Who seeks shall find.
Leap, and the net will appear.
I think it is most important for a teacher to play the pieces and studies that are being played by the student.