Bhur represents Bhuloka, the earth. Bhuvah represents the Life Force, Conscience in Man. Suvaha represents the power of radiation. All three are present in Man. Thus Durga, Lakshmi and Saraswati dwell in the human heart.
Men are prone to exhibit rajasic qualities like anger and hatred.
They are the menacing manifestations of Durga. The extolling of the Divine in song and poetry and the pleasing vibrations produced by them indicate the power of Saraswathi. The pure qualities that arise in Man such as compassion, love, forbearance and sympathy are derived from Laxmi. When people worship Durga, Laxmi and Saraswathi externally in pictures or icons, they are giving physical forms to the subtle potencies that are within them. The unfortunate predicament of Man today is that he is not recognizing the powers within him and developing respect for them.