Bhur bhuvah svahah Tat savitur varenyam
Just like the Sun annihilates darkness, the Gayatri Mantra destroys ignorance. The Gayatri Mantra invokes the power and radiance of the Sun to energize all earthly life, to destroy our sins and to reveal the Supreme Self to us. Krishna in the Bhagvad Gita says: “Amongst the Mantras, I am the Gayatri"
In translation that cannot possibly do
justice to the original, it implores: OM,
O Lord! You are the all pervading Source of Light, Sustainer, Protector
and Bestower of Happiness, Kindle, Enlighten and inspire our
Intelligence to possess Eternal Qualities.
The Gayatri Mantra is the essence of the three Vedas. It is the Vedas simplified. The more one contemplates and meditates upon the Gayatri, the more complexities are revealed to one.
The story goes that once the Devas, the Shining Ones, wanted to learn the secrets of the Universe. Since learning about the Scientific aspect 'atoms' etc. did not quite work out, they went to the Lord. The Lord gave them the Rig Veda, the Yajur Veda and the Sama Veda to study. After a couple of eons of study, the Devas lost their patience and wanted to quit. The Lord urged them not to give up and decided to teach the essence of the 3 Vedas in 3 fragments:
Essence of Rig Veda Tat Savitur Varenyam
The more the Devas practiced and contemplated upon the Gayatri, the more complexities were revealed to them. So they lost patience again and went to the Lord to make it simpler still. The Lord gave them the essence of the three segments in three words:
Bhur, Bhuvaha, Svaha
The Devas spent a a few cycles of Creation, probably a quadrillion human years, pondering upon the 'maha vyahritis' the 'Utterances of the Lord' but became impatient again and urged the Lord to make it simpler yet. So He Said "All right I'll make it simpler"
And He taught them AUM
The great western thinker, Arthur Koestler, once said that the Gayatri Mantra has the power of a thousand atomic bombs!