If someone wants to gain your trust, then do not trust him with your secrets, even if you see his faith and friendliness, otherwise you will suffer like a louse.
A certain louse lived quietly on the body of a rich nobleman, fed on his blood, quietly crawled, and he did not know about it. One night a flea came to visit her and, without any thought, bit her sleeping husband and woke him up. Getting out of bed, he discovered a louse and killed it, but the flea jumped back and escaped.
Translated from Russian · original on wisdomlib.ru