易者身の上知らず
Meanings
1
a fortune teller can't tell their own future; people don't know themselves as well as they know others
Proverb meaning that it is difficult to know one's own affairs or future, even if one can see those of others. Often used to point out someone's lack of self-awareness.
He gives love advice to others, but his own love life doesn't go well. It's truly a case of 'a fortune teller can't tell their own future.'
As the saying goes, 'a fortune teller can't tell their own future'—you surprisingly can't see your own affairs.