The rubrics of the traditional liturgy are all deliberate and with a purpose; those pertaining to the Holy Eucharist remind the priest he is handling the sacred mysteries, which are a heavenly food unlike any other.
Fr. Fredy Leonardo Herrera Fuentes in Bogotá, Colombia, told parishioners that 'from this moment in our parish, it’s only going to be possible to receive Holy Communion on the tongue and kneeling down.'
Catholics who receive Communion on the tongue don't do so out of some false piety or holier-than-thou attitude. Receiving Christ on the tongue while kneeling reinforces reverence for Our Eucharistic Lord.