J. Douglas MacMillan has been held at that institution in his honour. According to Hywel Jones, MacMillan's preaching was marked by "powerful originality and strong orthodoxy". He is best known for his book "The Lord Our Shepherd" (). This is an exposition of Psalm 23, originally given to the Evangelical Movement of Wales in 1979. MacMillan drew on his 12 years of experience as a shepherd to argue that the shepherd theme pervades the entire psalm. MacMillan wrote a number of other books including "Wrestling with God" () consisting of addresses on the life of Jacob given to the Evangelical Movement of Wales
Psalm 51 Opening of the mouth ceremony have been pointed out by scholar Benjamin Urrutia. These include: Following is the Hebrew text and an English translation of Psalm 51: Several verses from Psalm 51 are regular parts of Jewish liturgy. Verses (in Hebrew) 3, 4, 9, 13, 19, 20, and 21 are said in Selichot. Verses 9, 12, and 19 are said during "Tefillas Zakkah" prior to the Kol Nidrei service on Yom Kippur eve. Verse 17, "O Lord, open my lips", is recited as a preface to the Amidah in all prayer services. Verse 20 is said by Ashkenazi Jews before