Discernment is an important quality to cultivate , especially in the world of mainstream media and social media, and it is also important in the world of science, philosophy, and religion.
Truth is self-evident to the truthful person. One should understand the process by which one because honest in themselves and with others .
In purity of consciousness, one can genuinely follow ones heart , but utalising God given logic and rationale.
One should know the characteristics of a person who speaks truth and ask them how do you know you know ..

The Bhagavad Gita and the Srimad Bhagavatam give many indications of  how discernment can take place in the correct ways .

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