d to
Duty as seen in direct relation to Doctrine. So, the second half
is devoted to Duty primarily, and to Doctrine only as reduced to
practical Piety, Thus is the Christian Year divided between the
Creed and the Decalogue." The Last Sunday of the Season is observed
as the "Sunday next before Advent," but is popularly called "Stir
up Sunday" from the first two words of the Collect for the Day. The
Church color for the Trinity Season is green.

Trinity Sunday.--Trinity Sunday is a Festival of late institution,
as the day on which it is observed was originally kept as the Octave
of Whitsun Day. It was not until A.D. 1260 that it was first
directed by the Synod of Aries to be observed by the whole Church as
Trinity Sunday, although Thomas a Beckett is said to have instituted
this Festival in England in {261} A.D. 1162, and reference is
made to it as early as A.D. 834. The observance of this day is very
significant and rounds out or completes the former commemorations
of the year. As set forth in "Thoughts on the Services," "The
Church's services have culminated; to-day they mount up to the
Throne of the Godhead; for knowing the Son and the Holy Ghost, we
know the Father also, and that these Three are not three Gods, but
one God. The Church to-day celebrates the glory and majesty of God
in His essence and in His works. In the word _Trinity_, she simply
sums up what is revealed concerning Him,--that in Substance He is
One, but in Persons, Three. . . . The Collect enables us to worship
the _Unity_ which exists in the power of the Divine Majesty, even
while we acknowledge the glory of the Eternal Trinity." Proper
Lessons, Proper Psalms and Proper Preface in the Communion Office
emphasize the importance of the Festival and mark it as one of the
great days of the Church. The ecclesiastical color is white.

Trisagion.--A Greek word meaning the same as _Ter Sanctus_, _i.e._,
"Thrice Holy," but it is not used in the Greek Church for the same
thing, but is the title of the respond used in the Reproaches and
other services, namely, "Holy God, Holy and Mighty, Holy and
Immortal, have mercy upon us."

Triumphal Hymn.--The ancient name given to the Ter Sanctus, the hymn
in the Communion office beginning, "Holy, Holy, Holy."

Triumphant, The Church.--The Church in Heaven. (See CHURCH CATHOLIC.)
{262}

Tunicle.--A vestment worn by the Subdeacon or Epistoler at the
celebration of the Holy Communion; somewhat similar to the Dalmatic