One day Albert Einstein wrote on the blackboard:
9x1 = 9
9 x2 = 18
9 x 3 = 27
9 x 4 = 36
9 x 5 = 45
9 x 6 = 54
9 x 7 = 63
9 x 8 = 72
9 x 9 = 81
9x10 = 91
In class they mocked him and made fun of him because he had made a mistake, as the correct answer for 9 x10 is 90.
Albert Einstein waited for everyone to shut up and said: ′′ Despite me answering the first 9 questions correctly, no one congratulated me. Instead, when I got one wrong, everyone started laughing. This means that despite being very successful, society will only notice the smallest mistake and make fun of it. Don't let simple criticism destroy your dreams ".
MORALE.
Only those who do nothing don't make mistakes.
