you shouldn't form an opinion on someone or something based purely on what you see on the outside
du solltest dir keine Meinung über jemanden oder etwas bilden, nur weil du das Äußere siehst
"She may look serious, but don't judge a book by its cover."
"Sie sieht vielleicht ernst aus, aber urteilen Sie nicht nach dem Äußeren."
to make someone jealous
to dismiss something or someone as unimportant
to fail to meet expectations or standards
to feel refreshed and healthy again
a strong and intense wish to achieve something
very calm and composed