Truthfulness is the first pillar of Sanatan-Dharma.
Truthfulness is the first step of Bhakti (devotional service unto Lord Krishna).
Truthfulness is the most important quality that a Brahmin (priest) must have.
Mother earth can tolerate carrying any heavy object, but she cannot tolerate carrying the load of one liar.
Truthfulness exposes lies and thus stops liars.
Truthfulness exposes irreligious ideologies and thus stops irreligion.
Truthfulness exposes corruptors and thus stops corruption.
Truthfulness is purity.
Truthfulness makes a person decent.
One must speak the truth, stand up for the truth, and side with the truth.