I am a school master

In the past four and a half decades as a school master, I have known a few things. 
(1) Intention and outcome are not always the same, though we wish them to be, (2) Life is not merely following the rigid rules, (3) Half-truths are more dangerous than complete falsehoods, (4) ‘Higher Laws’ can’t be explained through worldly laws, (5) I am your leader. I am also your follower, (6) To become world-class one must have the desire to become world-class, (7) Connect science with money, but don’t always approach science with the soul of a money lender, (8) Intellect is essential part of any make-up, and (9) Respect the chair you are occupying.