Om Bhur Bhuvaḥ Swaḥ
Tat-savitur Vareñyaṃ
Bhargo Devasya Dhīmahi
Dhiyo Yonaḥ Prachodayāt

General meaning: We meditate on that most adored Supreme Lord, the creator, whose effulgence (divine light) illumines all realms (physical, mental and spiritual). May this divine light illumine our intellect.

Word meaning: Om: The primeval sound; Bhur: the physical body/physical realm; Bhuvah: the life force/the mental realm Suvah: the soul/spiritual realm; Tat:  That (God); Savitur: the Sun, Creator (source of all life); Vareñyam: adore; Bhargo: effulgence (divine light); Devasya: supreme Lord; Dhīmahi: meditate; Dhiyo: the intellect; Yo: May this light; Nah: our; Prachodayāt: illumine/inspire.