Thomas Aquinas,
Summa Theologiae — Question 31 - OF THE MINISTER OF THIS SACRAMENT…
“ Although the use of consecrated matter is of more importance than the consecration of the matter, from the point of view of the final cause; nevertheless, from the point of view of efficient cause, the consecration of the matter is the more important, since the use of the matter is dependent thereon, as on its active cause: hence the consecration of the matter demands a higher power than the use of the matter does. ”
