http://www.gayatrimata.org/gayatri_mantra.htm

oṃ bhūr bhuvaḥ svaḥ
tat savitur vareṇyaṃ
bhargo devasya dhīmahi
dhiyo yo naḥ prachodayāt

The meaning of the Gayatri mantra is as follows:
We contemplate the glory of Light illuminating the three worlds: gross, subtle, and causal.I am that vivifying power, love, radiant illumination, and divine grace of universal initelligence.We pray for the divine light to illumine our minds.