भूर्भुवः स्वः
तत्सवितुर्वरेण्यं
भर्गो देवस्य धीमहि
धियो यो नः प्रचोदयात्

Meaning:

Om, that (Divine Illumination) which Pervades the Bhu Loka (Physical Plane), Bhuvar Loka ( the Astral Plane) and Suvar Loka ( the Celestial Plane),
That Savitr (Divine Illumination) which is the Most Adorable,
On that Divine Radiance we Meditate,
May that Enlighten Our Intellect and Awaken our Spiritual Wisdom.

Gayatri Mantra