I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit.
The only person you should try to be better than is the person you were yesterday.
If everything was perfect, you would never learn and you would never grow.
If we want to feed the world, we must invest in smarter ways to raise livestock.