XLI. The foregoing, should be understood to relate and apply to the essential difference of keys, which consists, in the diversity of position of the semi-tones in the diapason; but not to their accidental difference; which, consists, in their being taken higher or lower. This may conduce something to create effect; because the same music, set in low notes, which is religious and grave, transposed to high ones, loses of its majesty, and acquires a degree of vivacity, that is ill suited to a solemn subject: and for this reason, I am of opinion, that the movements of church music should not be very quick: because, by hurrying the voices in the chant, they occasion them to sound harsh; and besides this, prevent that easy play and flexibility of throat, which is necessary to produce the effect the music requires; and which many times consists, or is contained in the intonations; I say further, that over and above these inconveniences, music composed of quick movements, and set in high notes, is not so well calculated to move the affections of respect, devotion, and piety, as that which is written in lower tones, and marked to be performed in slower time. SECT. XI. XLII. For the same reason, I am against the introduction of violins into churches. St. Thomas, in the place I before cited, objects to the admitting any kind of instruments in the church; and the reason he gives for the objection is, that the sensible delight which the instrumental music occasions, hinders devotion. But it is not easy to reconcile this reasoning, with what the saint says in another place, to wit, that the delight perceived by the air, excites weak spirits to devotion; and he, in the same place, approves of the use of musical instruments in synagogues, because the Jews being a hard and carnal people, there is a necessity for having recourse to such means, to provoke and stir them to piety. At least then for people of this stamp, musical instruments in churches would be very serviceable; and there being a great many of that disposition who frequent churches; consequently, the instruments would be found exceedingly useful. Besides, I can’t comprehend, how the sensible delight which instrumental music occasions, should induce to devotion those who on account of their hardness are little disposed to it, and obstruct it in those whose hearts are more inclined to divine worship.