A bright and bubbly ten year old bounced up to me at around noon today.
“Hello! I am in the top maths group at school.
I have a lovely tutor.
I love school.
This course is the best work I have ever done in my life.
It is so hard.
I love it.
Is there any chance of another course next week?”
With words like these all the hard work and preparation seem worthwhile.
Quod Erat Demonstrandum
In Latin that means that something has been demonstrated.
At school we used to write Q.E.D. after proving a theorem in geometry.