Good teachers love what they teach and so it comes naturally to them. All good teachers that have taught me were passionate about their subject. One would tell numerous stories and anecdotes, while the other would bring colorful chalks to make force diagrams on the blackboard.
“Surely, You’re Joking, Mr Feynman!” is a must read book if you want to rediscover the joy of learning. Today’s needull is written by Bill Gates discussing why Feynman was such an amazing teacher.