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 thanksgiving to the Lord “for the purpose of making [the Lord’s works] known to humankind, so that they too can join in the praise of [the Lord].” This concept seems to indicate that David has written a sort of circulatory hymn thanking the Lord for enabling the Israelites to thank the Lord. These concordant themes of enlightenment and gratitude reinforce each other throughout the psalm, and, indeed, throughout the rest of the fifth book of psalms, of which Psalm 107 is the opening hymn. As with much of the Old Testament, many Christians understand Psalm 107 to foreshadow an event