One day, a school teacher wrote on the board the  following:
9×1=7
9×2=18
9×3=27
9×4=36
9×5=45
9×6=54
9×7=63
9×8=72
9×9=81
9×10=90

When He was done, he looked back at the students and they were all laughing at him  because of the first equation which was wrong.

Then the teacher said the following:
I wrote the first equation wrong on purpose, because I wanted you to learn Something important.

This was for you to know how the world out there will TREAT you!

You can see that I wrote the RIGHT thing nine times, but none of you congratulated me for it.

But you all laughed and criticized me because of one wrong thing I did.

The lesson is:
The world Will Never Appreciate the good you do a million times, but will Criticize the one wrong thing you do.
So don't Get Discouraged!

ALWAYS RISE ABOVE ALL CRITICISM.