Endeavouring to keep the unity of the Spirit in the bond of peace.Ephesians 4:3
The confusion created by Arius regarding the doctrine of the Trinity and the person of Christ had created such acrimony within the Church that Constantine called the Bishops together at Nicea to resolve and reconcile.
For the Emperor, as Christianity was now the established religion of his Empire, a rift could therefore have serious repercussions where political unity was concerned. His concern was therefore of a secular nature, but nevertheless the God who rules over all would use his authority to lay down truth that we continue to derive comfort from today.
Constantine was quite correct , however, to emphasise the importance of unity within the Church as his opening speech demonstrated:
A study of the deliberations will show that the debates and discussions flowed until the august assembly came to a common mind on the teaching of Scripture. Opinions were changed, at one time the Arians appeared to hold the majority, those who were undecided came over to the Trinitarian position until eventually unity around the truth prevailed. It was this common mind of the Church which convinced them of the guidance of the Holy Spirit.
Similarly today, the blessing of God abounds where God’s people display a spirit of unity; such unity will be satisfying and much blessing will flow therefrom.
Behold, how good a thing it is,
and how becoming well,
Together such as brethren are
in unity to dwell!
Like precious ointment on the head,
that down the beard did flow,
Ev'n Aaron's beard, and to the skirts,
did of his garments go.
As Hermon's dew, the dew that doth
on Zion' hills descend:
For there the blessing God commands,
life that shall never end.
Psalm 133; The Scottish Psalter