Trent Session XXII is good enough for me.
From Chapter I we see that the primary purpose of the ordained priesthood is to re-present and offer the one sacrifice of Jesus Christ to the Father.
From Chapter II we see that the Mass is a propitiatory sacrifice of the Body and Blood of Jesus, which is pleasing and acceptable to God the Father. (The completion of the sacrifice requires the consumption of it, as per the former covenant, which is why the priest must
always receive – and under both forms – at Mass.)
From Chapter VI we see that the Church
desires that all those present at Mass (who are worthy to communicate) do receive Holy Communion, but that She also approves and commends Masses wherein only the priest communicates. The benefit of the Mass is not
only found in sacramental communion, but also in spiritual communion, as well as in the very fact of Mass being offered for the faithful.
Canons I and III and VIII condemn false opinions in these matters:
Canon I: If any one saith, that in the mass
a true and proper sacrifice is not offered to God; or, that to be offered is
nothing else but that Christ is given us to eat; let him be anathema.
Canon III: If any one saith, that the sacrifice of the mass is
only a sacrifice of praise and of thanksgiving; or, that it is
a bare commemoration of the sacrifice consummated on the cross, but not a propitiatory sacrifice; or, that
it profits him only who receives; and that it
ought not to be offered for the living and the dead for sins, pains, satisfactions, and other necessities; let him be anathema.
Canon VIII: If any one saith, that
masses, wherein the priest alone communicates sacramentally, are unlawful, and are, therefore, to be abrogated; let him be anathema.
Strong language, to be sure, but sometimes you need such language in order to make the line between Truth and falsehood clear.