one must learn to judge all things via the perceived truths
that one receives from others

for example, sunny days make you feel good

rainy days make you feel gloomy

if you are told this is so, that is what you will believe to be so

but you can have fun on a rainy day as well

your truth can be changed simply by the way you accept it
Thats how fragile the truth for a human is.

A person's truth is so simple that most ignore it
to concentrate on what they think are deeper truths.