On the face of it, this shloka seems to talk about the hands, and three goddesses who reside in each part of it. But we can trace the roots of this shloka to the vedas, which suggest a more philosophical meaning, in the form of a metaphor. Saraswati is knowledge, Gowri is health, and Lakshmi is wealth. If we grasp these three in our hands, we can lead a complete life. This is great advice for life!