“There is a grain of truth in every lie.”
But what is a lie, and what is the truth?
In my opinion:
A lie is a collection of elements of thought that, when put together, do not match the generally accepted reality.
The truth is the same as a lie, except that the whole does match the generally accepted reality.
There is no “false” element of thought in itself. This comes from the human brain’s inability to invent things. A person cannot create something whose elements they have not perceived beforehand.
This makes us think about everything happening around us.
We should carefully observe everything around us and draw out the elements that are real in our world.