I found these quotes from some well-know and reasonably holy people...
"There is an apostolic letter on the existence of a special valid permission for this [Communion in the hand]. But I tell you that I am not in favour of this practice, nor do I recommend it." - His Holiness (soon to be Blessed) Pope John Paul II, responding to a reporter from Stimme des glaubens magazine, during his visit to Fulda (Germany) in November 1980.
Holy Communion received on the tongue "signifies the reverence of the faithful for the Eucharist ... provides that Holy Communion will be distributed with due reverence ... is more conducive to faith, reverence and humility.... It [Communion in the hand] carries certain dangers with it which may arise from the new manner of administering holy Communion: the danger of a loss of reverence for the August sacrament of the altar, of profanation, of adulterating the true doctrine." - The Servant of God Pope Paul VI in his instruction Memoriale Domini (May 29, 1969)
"Wherever I go in the whole world, the thing that makes me the saddest is watching people receive Communion in the hand."- As reported by Fr. George Rutler in his 1989 Good Friday sermon at St. Agnes Church, New York. When Blessed Teresa of Calcutta was asked by Fr. Rutler, "What do you think is the worst problem in the world today?" without pausing a second she gave the above reply. She stated that to her knowledge, all of her sisters receive Communion only on the tongue.
"Behind Communion in the hand—I wish to repeat and make as plain as I can—is a weakening, a conscious, deliberate weakening of faith in the Real Presence.... Whatever you can do to stop Communion in the hand will be blessed by God.”
- Fr. Hardon, S.J., November 1st, 1997 Call to Holiness Conference in Detroit, Michigan, panel discussion.
"There can be no doubt that Communion in the hand is an expression of the trend towards desacralization in the Church in general and irreverence in approaching the Eucharist in particular.... Why—for God's sake—should Communion in the hand be introduced into our churches when it is evidently detrimental from a pastoral viewpoint, when it certainly does not increase our reverence, and when it exposes the Eucharist to the most terrible diabolical abuses? There are really no serious arguments for Communion in the hand. But there are the most gravely serious kinds of arguments against it." - Dietrich von Hildebrand (called a “20th century doctor of the Church” by Pope Pius XII), in an article entitled "Communion in the Hand should be Rejected," November 8, 1973.
"With Communion in the hand, a miracle would be required during each distribution of Communion to avoid some Particles from falling to the ground or remaining in the hand of the faithful.... Let us speak clearly: whoever receives Communion in the mouth not only follows exactly the tradition handed down but also the wish expressed by the last Popes and thus avoids placing himself in the occasion of committing a sin by negligently dropping a fragment of the Body of Christ.”- Bishop Juan Rodolfo Laise of San Luis, Argentina in his book Communion in the Hand: Documents and History.
There are these authorities as well...
ST. SIXTUS I (115-125). Prohibited the faithful from even touching the Sacred Vessels: "Statutum est ut sacra vasa non ab aliis quam a sacratis Dominoque dicatis contrectentur hominibus..." [It has been decreed that the Sacred Vessels are not to be handled by others than by those consecrated and dedicated to the Lord.]
POPE ST. EUTYCHIAN (275-283). Forbade the faithful from taking the Sacred Host in their hand.
ST. BASIL THE GREAT, DOCTOR OF THE CHURCH (330-379). "The right to receive Holy Communion in the hand is permitted only in time of persecution." St. Basil considered Communion in the hand so irregular that he did not hesitate to consider it a grave fault.
COUNCIL OF SARAGOSSA (380). It was decided to punish with EXCOMMUNICATION anyone who dared to continue the practice of Holy Communion in the hand. The Synod of Toledo confirmed this decree.
POPE ST. LEO I THE GREAT (440-461). Energetically defended and required faithful obedience to the practice of administering Holy Communion on the tongue of the faithful.
SYNOD OF ROUEN (650). Condemned Communion in the hand to halt widespread abuses that occurred from this practice, and as a safeguard against sacrilege.
SIXTH ECUMENICAL COUNCIL, AT CONSTANTINOPLE (680-681). Forbade the faithful to take the Sacred Host in their hand, threatening the transgressors with excommunication.
ST. THOMAS AQUINAS (1225-1274). "Out of reverence towards this sacrament [the Holy Eucharist], nothing touches it, but what is consecrated; hence the corporal and the chalice are consecrated, and likewise the priest's hands, for touching this sacrament." (Summa Theologica, Pars III, Q. 82, Art. 3, Rep. Obj. 8)
COUNCIL OF TRENT (1545-1565). "The fact that only the priest gives Holy Communion with his consecrated hands is an Apostolic Tradition."
And, for sake of balance I encourage everyone to post similar quotes in favour of this practice from such eminent Saints, Beati & saintly ecclesiastics.