The Mundaka Upanishad boldly proclaims: Satyameva Jayate – Truth alone Triumphs and not Untruth. This is because only by being truthful with ourselves and with others, can we clear away the scum of the ego-driven imperfections that cloud our mind; and when the mind is thus purified, our soul can see its reflection clearly and realize its True Self, its Infinite Divine Svarupa in Samadhi or Moksha.
Therefore the act of speaking the truth always takes us towards Soul-realization, which is the same as God-realization.
On the other hand when we lie to ourselves and to others, then we immediately cloud our mind with egotistical impurities and thus devolve to a lower consciousness by getting enveloped in the darkness of falsehood. For this reason being truthful has always been emphasized by the sages of the Upanishads as the most important spiritual discipline.
And it was this very same teaching of the Mundaka Upanishad that Sri Ramakrishna underscored for his disciple Rakhal (Swami Brahmananda) in a very interesting incident. At the time this incident took place, Rakhal was still a young disciple under the tutorship of Sri Ramakrishna and had not yet attained to Nirvikalpa Samadhi or complete mergence with God. Hence Sri Ramakrishna was focused on pointing out the imperfections in his disciple’s nature, so that Rakhal could correct them and thus attain to the perfection of God-consciousness.
Satyameva Jayate – Truth Alone Leads to God – Sri Ramakrishna Teaches Rakhal
“When the lamp of truth is lit, darkness vanishes by itself.
Stand up men and women, dare to believe in the truth, dare to practice the truth!”
– Swami Vivekananda
One day when Rakhal came to Sri Ramakrishna’s room, Sri Ramakrishna said to him: “Rakhal, for some reason, I can’t look at you. I see a veil of ignorance covering your face. Tell me have you done anything wrong?”
Rakhal was greatly perturbed. He tried hard to remember what he had done wrong but could not recollect anything.
“Try to recall”, Sri Ramakrishna said “if you have told any untruth.” Rakhal immediately remembered and admitted that he had recently jokingly told a lie to a friend.
Sri Ramakrishna forgave him and said: “Never do it again. To speak the truth always is the most important spiritual discipline. The virtue of truthfulness is most critical. If a man always speaks the truth, and tenaciously holds to the truth he will realize God, for God is Truth.”
(The above incident is found recorded in the book: The Eternal Companion – Life and Teachings of Swami Brahmananda.)