This is taken from Vespers in the Eastern Rite for the Baptism of Jesus…
from Theophany…
At the voice of one crying in the wilderness, ‘Prepare ye the way of the Lord’,
You have come, Lord, taking the form of a servant,
and You who know not sin ask for baptism.
The waters saw You and were afraid;
the Forerunner was seized with trembling and cried aloud saying:
‘How shall the lamp illuminate the Light?
How shall the servant set his hand upon the Master?
O Savior who take away the sin of the world,
sanctify both me and the waters.’
At the Baptism of the Lord, it was the first time that the Trinity was manifest to the world. A tremendously awesome moment. We now baptize in the name of the Father, and the Son, and the Holy Spirit. John was not baptizing with this form.