The doctrine of the Trinity is not an impractical doctrine. It permeates the whole life of the believer. This article shows how the Trinity and each person thereof shapes public worship, preaching, and service.
This article considers the unity of the Trinity in Christ's command to baptize disciples.
This article, in summary form, explains why Christians believe in the Trinity.
This article discusses how the doctrine of the Trinity makes a practical difference in the lives of believers: it names our God, explains prayer, shows us how to love, and leads us to the cross.