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 107 Despite the transgressions of the Israelites, the Lord forgives them. The psalm elaborates on this theme, going on to say that the Lord “turns a desert into pools of water ... and there he lets the hungry dwell” (v. 35, 36). This description of miracles as performed by the Lord reinforces the imagery of “wonderful works” mentioned earlier in the psalm (v. 8). The works of the Lord, however, are mentioned in many psalms; what makes Psalm 107 somewhat unusual is its depiction of the works of the Lord as explication for the people. The psalm is a hymn of