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 110 specifically refers to Jesus as the Messiah. Spurgeon concurs that while David composed the psalm, the psalm is solely about Jesus. The difference in interpretation between Jewish and Christian sources pivots on the translation of the Hebrew word אדני ("Adonai") in verse 1. This is usually translated as "my master" or "my lord", thus rendering the verse as "The Lord spoke to my master". While "Adonai" is one of the names of God, thoughout the Tanakh it refers to a human "master" or "lord". Since David wrote this psalm in the third person, to be sung by the Levites in