^ by that logic, does this mean that truth is to believe ? what if I believe that the sky is green, is that any true ?
You are mixing up true -false with truth - lie.
If you really believe the sky is green , and you tell me so, then you're not lying.
It's an opinion, it is your truth.
Doesn't necessarily have to match my opinion.
Check the word "perception" if you wanna know more.