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 23 English was made in 1565 by Thomas Sternhold. Other metrical versions to emerge from the Protestant Reformation include those from "The Bay Psalm Book" (1640) and a version influenced by Sternholm published in the Scottish Psalter (1650). The latter version is still encountered, with modernized spelling, in many Protestant hymns. Other notable metrical versions include those by George Herbert, Philip Sidney, and Isaac Watts. A metrical version of the psalm is traditionally sung to the hymn tune "Crimond", generally attributed to Jessie Seymour Irvine. This version, with its opening words "The Lord's My Shepherd", is probably the best-known amongst English-speaking