Too Early for the next class

“Too early for next class”, heard a base voice in pin drop background.
We (two of us)left the room, silently. Voice was from our Professor. Room was our Mechanics Class room.
We made slightly late to the class, after the fresh hot coffee .
It was Two consecutive hours of same subject, Mechanics.
We ‘understood’ the satire that we were late for the first hour and left the class room.
After few months we were entering the class again slightly late, blamed it on hot coffee.
Second time, no voice, just a smile and we made it to third desk.
Not quite sure we understood why we were allowed (not that we understood the lift and drag forces of buoyancy, better), we were trying to figure out the reasons for permitting us.
After the classes (two hours) got over, we gathered courage and asked the Professor as to why we were allowed second time to enter the classes as we were late by few minutes.
He said, we were doing better at the subject and occasionally missing few minutes (for the right reasons) won’t be an issue for us. 
We understood that it was meant to be “we were ready for the next class (second hour) with our grasp on the subject, even with few minutes of absence from the first (hour) class” and He never denied entry in both occassions!
That’s when we understood his famous quote of saying “There are many ways to do a thing, but there’s only one Elegant way’.
How elegant was He in making us see the beautiful meaning behind “Too early for the next class”.
Trying to work out elegant solution wherever possible