Indisputably, Gayatri* is the greatest Mantra in the Vedas. It has been claimed that it is the quintessence of Vedas. The Mantra:
ॐ (भूर्भुवहसुवह) तत् सवितुर्वरेण्यं
भर्गो देवस्य धीमहि धियो यो नः प्रचोदयात्॥
The Mantra means that that there are three layers of existence and in all the layers, that sun Brahman (universal Consciousness) provides its effulgence. We focus our awareness towards that wisdom. We are ordained to repeat this Mantra