Blasphemy

St. Thomas Aquinas in the Summa Theologica:

"none of God's works have been made in vain" - 1st par. Q. 67, A.4 Reply to Obj. 2

"God and nature make nothing in vain" - 3rd par. Q.9. A. 4

"the Church does nothing in vain" - 3rd par. Q. 71. A.3

"it would be blasphemy to say that the Church does anything in vain" - Supp. Q. 25. A.1