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 22 of Christ's garments before crucifixion. The psalm was preceded and followed by the antiphon "Diviserunt sibi vestimenta mea: et super vestem meam miserunt sortem" (They divided my clothes among them and cast lots for my garment). The chanting of this psalm was suppressed in the 1970 revisions to the Mass. It is still included in many parts of the Anglican Communion. Since the Middle Ages, this psalm was traditionally performed during the celebration of the vigils dimanche, according to the Rule of St. Benedict set to 530, as St. Benedict of Nursia simply attributed Psalms 21 (20) 109 (108) offices