Trinity Sunday

Trinity Sunday is unique on the Church calendar in several ways. Historically, its origins are late. It seems to have been observed first in the early 900s in what later became Belgium and to have spread rapidly in northwestern Europe, including England. The observance was not added to the Roman calendar until the 1300s. Another distinction of Trinity Sunday is that, unlike other major holy days, it focuses on a doctrine rather than an event. 

Decades ago, I came to realize two central points about the doctrine of the Trinity. First, it is definitely rooted in Scripture. While the word "Trinity" and an explicit definition are not found in a single key passage, the Trinity permeates the whole Biblical canon. A person cannot reject this doctrine without discarding many Scripture passages, especially in the New Testament. 

Secondly, the doctrine of the Trinity is an essential part of a Christian perspective. It provides the structure of the ancient Creeds and hymns which summarize God's work to save us from our sins. The doctrine of the Trinity is also present whenever Christians pray. Regardless of which divine person we invoke at a particular moment, Christians are always calling upon the Triune God. We look to God as our heavenly Father through the mediation of His Son Jesus Christ prompted by the inspiration of the Holy Spirit. Glory be to the Father, and to the Son, and to the Holy Ghost...