好事魔多し
Meanings
1
good things are often followed by trouble; joy and sorrow go together
A proverb warning that happiness or success is often accompanied by unexpected difficulties or misfortune. Used to remind someone to stay vigilant even when things are going well.
Getting sick right after a promotion is a perfect example of 'good things are often followed by trouble.'
He won the lottery, but then had a falling-out with his family. This is exactly what they mean by 'joy and sorrow go together.'