therein lies
idiomPart oftherein
therein lies — idiom
1. used to introduce or emphasise the result, problem, or important point of a situ
1.idiom
Definition
used to introduce or emphasise the result, problem, or important point of a situation that has just been described
Example
The company expanded too quickly, and therein lies the source of its financial troubles.
Reema believed the plan was perfect, but therein lay the real danger.