I receive Holy Communion both ways: tongue on Sunday and hand on weekdays. Though my conviction veers toward reception on the tongue, there is a personal reason for the variation.
As I have lived, I have grown to have a low opinion of humanity. This habit of thinking has become second nature, and it is one of my biggest stumbling blocks. Dualism, Gnosticism, Calvinism, and Jansenism appeal to me because of the rotten things they say about our humanity. What a harsh addiction of thought to fight against every day, but what better way to combat it than by receiving Communion on the hand? Since days other than Sunday are penitential days, on them I offer the Eucharist standing and on the hand (“we thank you for allowing us to stand in your presence”), to remind myself that our seemingly crude flesh is intimately tied to our luminous souls.
It is incredibly moving to know that God Almighty has deigned us worthy, by His Incarnation, to be touched, held, embraced, and worshiped bodily by us. Had the Incarnation not happened and divinity not united to humanity, I would only receive on the tongue. Now, though, my hands have been made indescribably luminous by the Advent of God, who has marvelously cleansed us entire.
Sunday is the day of ease, rejoicing, and victory. I offer Communion on the tongue on this holy day because I prefer it on the tongue. The rest of the week is a constant penitential battle to remind myself of what dignity our redeemed species is invited to. I invite all to take Communion on the hand just once in their entire lives and look at the Host for a brief, split second. See: as God allowed Himself to be held in the arms of a frail, humble creature in the stable, so even we imperfect saints have been allowed to stand and hold Him, if veiled. Are our tongues not of the same flesh as the hand? How glorious!